Cloaca function human

Females typically have three openings to accommodate the genital, intestinal and urinary tracts. In developing fetuses, these openings are joined in a sac known as the cloaca Although the cloaca sounds efficient, when it occurs in humans it presents major challenges. All human fetuses start off with a cloaca, but during a normal pregnancy it separates, forming the all-important urethra, anus and reproductive organ The product of a lengthy collaboration between Belgian artist Wim Delvoye and scientists at the University of Antwerp, Cloaca mimes the function of the human digestive system using a complex series of computer-monitored glass chambers, tubes, pumps, enzymes, bacteria, and acids that extend over 30 feet Early in the development of a female fetus, the tissue that is supposed to become the intestinal, genital, and urinary tracts are together in one unit known as a cloaca. These three typically separate as a pregnancy proceeds, creating the anus, the vagina, and the urethra

Cloacal Malformation (Persistent Cloaca): Symptoms

(noun) The cloaca is the single posterior opening for a bird's digestive, urinary, and reproductive tracts and is used to expel feces and lay eggs. The cloaca is found on the rear of the body under the base of the tail, covered by feathers on the extreme lower abdomen The cloaca is a structure in the development of the urinary and reproductive organs The function of the cloaca is: urinary, intestinal, and genitalia. All of the urine/sperm is held here, then to the bladder. A frog's cloaca allows a frog to deliver eggs and sperm to get them.. A cloaca is a chamber that is found on some types of animals, especially birds and reptiles. Instead of having separate openings in the body for fecal matter, urine and reproductive fluids, all of these systems discharge their contents into the chamber, where they are eliminated through a single opening In animal anatomy, a cloaca / k l oʊ ˈ eɪ k ə / kloh-AY-kə (plural cloacae / k l oʊ ˈ eɪ s i / kloh-AY-see or / k l oʊ ˈ eɪ k i / kloh-AY-kee) is the posterior orifice that serves as the only opening for the digestive, reproductive, and urinary tracts (if present) of many vertebrate animals. All amphibians, reptiles, birds, and a few mammals (monotremes, tenrecs, golden moles, and.

Development of Urinary System - CKR 19

Cloaca, (Latin: sewer), in vertebrates, common chamber and outlet into which the intestinal, urinary, and genital tracts open. It is present in amphibians, reptiles, birds, elasmobranch fishes (such as sharks), and monotremes. A cloaca is not present in placental mammals or in most bony fishes Cloacal anomalies refer to a collection of defects that occur during fetal development in a female's lower abdominal structures. There are many variations to these defects but the most common involve a merging of the rectum, genital tract (vagina), and urinary tract (urethra) into one exit out of the body Persistent cloaca is a rare congenital defect that only occurs in females. The malformation occurs during fetal development when the rectum, vagina, and urinary tract fail to separate. As a result, a baby is born with all three grouped together, forming a single channel. Various diagnostic procedures pre and post-natally are used Cloaca literally meas a sewer - a coduit for carrying of drainage water and waste matter. The cloaca in human fetus have the same function, i.e. carries waste porducts in the from of urine and stool. Cloaca: Common chamber for the hindgut and urinary systems

Urogenital System - Frogs vs

Cloacal malformations occur in 1 per 20,000 live births; the etiology is unknown. They occur exclusively in girls and represent the most complex defect in the spectrum of anorectal malformations.. Locate the cloaca between the pelvic fins. This is the common opening for the intestine, the urinary tract, and reproductive system. As they make the first incision from the cloaca to the pectoral girdle, students will notice a tough piece of cartilage between the pectoral fins. Have them speculate about the functions of the pectoral girdle The cloaca is a common space that collects the waste and opens into the outside of the body. The outer opening is commonly referred to as the vent. The cloaca is divided into three main sections: the coprodeum, the urodeum, and the proctodeum. The coprodeum collects the fecal matter from the colon

Many Animals Have a Cloaca, But Humans Should Not

It functions as part of a recto-cloacal valve and brings the urinary openings close to the opening of the bladder. The lining epithelium of the cloaca is derived half from ectoderm and half from endoderm; the former in its stratification and glands resembles the skin, the latter is composed of tall glandular cells with some resemblance to those. Cloaca: A common passageway for feces, urine and reproduction. At one point in the development of the human embryo, there is a cloaca. It is the far end of a structure called the hindgut. This structure then divides to form a rectum, a bladder, and genitalia. The presence of a cloaca is normal in many adult animals (birds, reptiles, amphibians. A cloaca is a common chamber into which some or all of the digestive, urinary, and reproductive tracts discharge their contents. A cloaca exists in all human embryos up to 4-6 weeks, at which time it becomes partitioned into the urogenital sinus and the rectum. A cloaca forms when the cloacal membrane does not recede or the mesoderm does not. Background: During normal development in human and other placental mammals, the embryonic cloacal cavity separates along the axial longitudinal plane to give rise to the urethral system, ventrally, and the rectum, dorsally. Defects in cloacal development are very common and present clinically as a rectourethral fistula in about 1 in 5,000 live human births

Liquid wastes from the kidneys go through the ureters to the urinary bladder. Solid wastes from the large intestine go into the cloaca. Both the liquid and solid wastes leave the body through the cloaca (klo-ache-uh). The digestive system in humans is much more complicated What is Cloaca? The word cloaca comes from Latin word meaning sewer, and it literally performs a function similar to sewer in vertebrates. It is a common chamber and outlet into which intestinal, urinary and genital tracts open. Cloaca is present in amphibians, reptiles, birds, fish and monotremes A 'cloaca' is a single conduit which links the urinary, genital and alimentary tracts with the exterior of an organism. In the adult duck-billed platypus and echidna, both monotremes, a cloaca is the norm (1), whereas in all other adult mammals, each of these tracts exits the body through a separate opening

Cloaca - The common opening of the urinary and reproductive systems. It receives waste from the kidneys and fluids from the reproductive organs and transfers them to the external environment via the opening of the cloaca. The urogenital papilla is a protrusion that may be extending from the cloaca The ejaculatory duct joins to the rectum to form cloaca. This duct contains a number of prostatic glands whose secretions help in copulation. Penial spicules: Penial spicules are located in the spicular pouch. Two spicular pouches are situated on the dorsal side of the cloaca. These are basically evaginations of the cloaca

Wim Delvoye: Cloaca - The Brooklyn Rai

  1. Using a novel assay for cloacal function, we find that larvae with reduced mid-gastrula Bmp signaling cannot properly excrete waste. We show that the cloacal defects result from alterations in the morphogenesis of the cloaca and from changes in the expression of genes marking the excretory system
  2. The main functions of the cecum are to absorb fluids and salts that remain after completion of intestinal digestion and absorption and to mix its contents with a lubricating substance, mucus. The internal wall of the cecum is composed of a thick mucous membrane, through which water and salts are absorbed
  3. Erika F. Werner, Maureen S. Hamel, in Obstetric Imaging: Fetal Diagnosis and Care (Second Edition), 2018 Abstract. A cloaca is a common chamber into which some or all of the digestive, urinary, and reproductive tracts discharge their contents. A cloaca exists in all human embryos up to 4-6 weeks, at which time it becomes partitioned into the urogenital sinus and the rectum
  4. Persistent cloaca. When an infant first begins to develop in the uterus, the anorectal, urogenital and reproductive systems meet in the same opening, called a cloaca. Before birth, these 3 areas of the body should separate into 3 different tracts, each with its own passage, or channel, and opening to the outside of the body
  5. In this report we review the existing literature on bladder development and cellular signalling with particular focus on bladder development in humans. The bladder and ureterovesical junction form primarily during the fourth to eighth weeks of gestation, and arise from the primitive urogenital sinus following subdivision of the cloaca
  6. Development of the human bladder and ureterovesical junction trigone and ureterovesical junctions are key to bladder function, by allowing one-way passage of urine into the bladder without obstruction. Embryological development of these structures has been studied in multiple animal from the cloaca, an epithelial chamber common to both.
  7. cloaca Digestive Tract Structures and Functions 1. Teeth (or gizzard) - physical breakdown. 2. Crop - storage 3. Stomach - chemical breakdown 4. Intestine - absorption and breakdown in small intestine; water absorption in large intestine. 5. Cecum/Rumen - fermentation 6. Rectum - water removal, storage 7. Various glands/organs for.

Cloacal Malformations: Treatment, Tests & Recover

In its imitation of human behavior, Cloaca even functions as a modern-day golem. Although Cloaca's embodiment of contemporary culture depends on its combination of art, science and technology, it also has important art historical precedents. Delvoye's fascination with the power of the machine to simulate human activity contains echoes of such. Bronchi are the main passageway into the lungs. When someone takes a breath through their nose or mouth, the air travels into the larynx. The next step is through the trachea, which carries the. Function Ithelps tomaintain waterbalance by absorption. Organs and Functions Cloaca andVent Cloaca: Where the digestive, urinaryand reproductive systemsmeet. Vent: The external opening of thecloaca that passes waste to theoutside

Bmp7 functions via a polarity mechanism to promote cloacal septation During normal development in human and other placental mammals, the embryonic cloacal cavity separates along the axial longitudinal plane to give rise to the urethral system, ventrally, and the rectum, dorsally. Defects in cloacal development are very common and present. The elimination of both undigested solid and liquid wastes happen through the cloaca. The urinary bladder also opens into the cloaca since frogs do not have a urethra. Moreover, frogs do not have an appendix. Conclusion. Frogs digestive system shares many similarities with the human digestive system in terms of anatomy and function Finally, we show that HrT, a T-box transcription factor, is a Bmp-regulated gene that has an essential function in cloacal development. We conclude that sustained Bmp signaling plays an important role in specification of the zebrafish cloaca by maintaining the fate of extreme ventral cells during the course of gastrulation and early somitogenesis

Cloaca Definition - Bird Anatomy - The Spruc

Cloaca (embryology) - Wikipedi

  1. al part (pars abdo
  2. All biology students will study the anatomy of the human body. at the posterior end called the cloaca. This opening allows for waste, eggs, or sperm to be discharged. brain, spinal cord.
  3. Cloaca. The common opening. Adrenal glands. Dark colored bands on the kidneys that produce adrenaline. The human equivalent to an oviduct. Anus. Opening through which feces exits the human. Part of brain that deals with basic functions (ie. digestion) Spinal cord. Carries information to and from the brain. Vertebral column
  4. e, for the first time, the morphogenesis of the presumptive cloaca. Finally, we show that the T-box transcription factor HrT is an important downstream mediator of Bmp signaling in excretory system development
  5. ation. The general pattern is to have an oral (buccal) cavity, pharynx, esophagus, stomach and intestine

The Cloaca. The colon, ureters and deferent ducts/left oviduct enter at various levels. It can be divided into the coprodeum, urodeum and proctodeum by complete annular folds. Some urinary excretions arriving in the cloaca become incorporated with the ingesta and move in a retrograde fashion to the caeca, increasing the absorption of water and electrolytes from the urinary waste Cloaca Organ through which the products of the frogs digestive and urogenital system pass when discharged from the body. Opening of cloaca through which undigested food, urine, eggs, and sperm are passed The Mouth. Vomerine Teeth: Used for holding prey, located at the roof of the mouth Maxillary Teeth: Used for holding prey, located around the edge of the mouth. Internal Nares (nostrils) breathing, connect to lungs. Eustachian Tubes: equalize pressure in inner ear. Glottis: Tube leading to the lungs. Esophagus: Tube leading to the stomach. Tongue: Front attached, aids in grabbing pre Built from chemical beakers, electric pumps, and plastic tubing arrayed on a series of seven stainless steel tables, Cloaca is the result of a three-year collaboration between the artist and scientists at the University of Antwerp, whose shared mission was to duplicate the functions of the human digestive system as closely as possible

What is the function of a frogs cloaca? - Answer

Title: Human Anatomy Urinary Bladder | m.kwc.edu Author: S Ben Porath - 2015 - m.kwc.edu Subject: Download Human Anatomy Urinary Bladder - Demonstrate anatomy and physiology of the male urinary system 53440 S Correct bladder function 0385 C1763 Conn tiss, non-human 53440 S Correct bladder function 0385 C1781 Mesh (implantable) 53440 S Correct bladder function 0385 C2631 Rep dev, urinary, w/o. The function of this organ system is to assist the frog in excreting urine and reproducing. produces eggs for female frog - ovary is miniscule while eggs can be spotted with the human eye Urinary Bladder : Used to store urine Cloaca : Location where sperm, eggs, urine, and feces leave the frog's body Bladder: Facts, Function & Diseases. Two long tubes called ureters connect the bladder, which stores urine, to the kidneys, which produce urine. (Image credit: Nerthuz | Shutterstock ) The bladder. The major organs involved in the process of digestion in frogs include mouth, pharynx, esophagus, stomach, small intestine, large intestine, and cloaca. Accessory organs such as the liver, pancreas, and gallbladder are also an important part of the digestive system of frogs. This BiologyWise post provides a labeled frog digestive system diagram to help you understand the digestive process in. The shark anatomy includes an intestine that is used for digestion. The shark's intestine is shortened, but it also spirals so that it takes up the least amount of space possible. When a shark needs to get rid of waste, it utilizes its kidneys, genitals, and cloaca. The cloaca is an opening that the kidneys and genitals empty into. Shark Skeleto

Handbook - Male Reproductive System - Proctodeum

What Is a Cloaca? (with pictures) - All Things Natur

  1. g of sexual maturity. Yet, the basic anatomy and function of the cloaca in non-avialan dinosaurs remains unknown. Here, we describe the outer morphology of the only known non-avialan dinosaur cloaca, preserved in an exceptional specimen of the early-diverging.
  2. The anorectal and urogenital systems arise from a common embryonic structure termed cloaca. Subsequent development leads to the division/septation of the cloaca into the urethra, urinary bladder, vagina, anal canal, and rectum. Defective cloacal development and the resulting anorectal and urogenital malformations are some of the most severe congenital anomalies encountered in children
  3. The human small intestine is over 6m long and is divided into three parts: the duodenum, the jejunum, and the ileum. The C-shaped, fixed part of the small intestine is called the duodenum and is shown in Figure 10. The duodenum is separated from the stomach by the pyloric sphincter which opens to allow chyme to move from the stomach to.
  4. Poultry farms and chicken eggs—an addendum: Originally I didn't use the word cloaca. One of my readers suggested I use the proper word. I called it the chicken's ass or butt hole. In praise of the purity of chickens, let me explain that the bird..

Non-mammal vertebrates, such as most birds and reptiles, have a cloaca: a single body opening w hich functions in the digestive, excretory and reproductive systems. Mating between birds usually involves positioning the cloaca openings opposite each other for transfer of sperm from male to female Cloaca: opening shared by the genital organs, the urinary and intestinal tracts. Pelvic fin: locomotive limb situated beneath the pelvic girdle of a shark. Posterior intestine: part of the digestive tract just after the stomach. Liver: bile-producing digestive gland

Receptor tyrosine kinase which binds promiscuously transmembrane ephrin-B family ligands residing on adjacent cells, leading to contact-dependent bidirectional signaling into neighboring cells. The signaling pathway downstream of the receptor is referred to as forward signaling while the signaling pathway downstream of the ephrin ligand is referred to as reverse signaling Cloaca Maxima, the sewage system, cloacum means toilet in Latin. And it doesn't force you into one interpretation. It's just a name, like Wim, Cloaca, you know, because calling it gastrointestinal would be too descriptive, too academic. JA: It's nice that it has a name for itself without saying too much. WD: Yeah, Cloaca, Cloaca. It allows me.

Cloaca - Wikipedi

The waste product of all this is called bile, which has a function in digestion. KIDNEYS . Hens do have kidneys, even though they don't have a bladder. They drain into an area in the cloaca called the urodeum. Uric acid forms in the liver and is removed from the blood by the kidneys and this is vented out in the cloaca via the vent The cloaca is a common chamber, receiving products from the digestive, urinary, and reproductive systems. The liver, gall bladder, and pancreas are all associated with the digestive system. The liver is the largest internal organ in a snake, filling the space between the heart and stomach Human Urinary System Major Organs and Functions; Two kidneys. located below the ribs toward the middle of the back. Their function is to remove liquid waste from the blood in the form of urine; keep a stable balance of salts and other substances in the blood; and produce erythropoietin, a hormone that aids the formation of red blood cells The platypus swims by paddling with its front webbed feet, and steers with its hind feet and tail. Males have poisonous barbs on the backs of their feet, used mostly just for self-defense. Each one has enough poison to kill a small animal, or incapacitate a human. The platypus has 231 bones. Although its hip structure does not change while. Human Heart: Anatomy, Function & Facts. The human heart is an organ that pumps blood throughout the body via the circulatory system, The frog cloaca is a short simple tube receiving at its inner end the genital and urinary ducts, the rectum, and the allantoic bladder

Overview and function of the excretory system the intromittent organ is the penis, which develops from the wall of the cloaca; in other species, sperm transfer occurs through cloacal apposition. Eggs are found in primordial follicles (approximately 2 million in human females at birth) but only approximately 400 are ever actually. The definitive management of cloaca is surgical, with the goal of separating the gastrointestinal, gynecologic, and urologic structures and creating a perineal opening for each of the three structures for optimization of the function of each system, and to create a catheterizable urethra The cloaca is the last portion of the alimentary canal. It collects the products of the colon as well as the urogenital ducts. It is a catch-all basin leading to the outside by means of the cloacal opening. Shark Cloaca. Labeled Cloaca: Click the radio button next to the appropriate answer for each question: 1. Which of the labelled arrows is.

Cloaca anatomy Britannic

• Pseudocoel functions as hydrostatic skeleton- common in invertebrates • Digestive system is complete- mouth, gut, anus •Reproduction: ♀ tube subdivided into Ovary, oviduct, uterus, vulva (gential pore) ♂ chitinous spicule, vas deferens joins digestive tract to form cloaca Nematod Function follows form: Predicted protein structures for human proteome now. Researchers at Google AI company Deepmind and the European Molecular Biology Laboratory/European Bioinformatics Institute have developed and published an open-access database with predicted structures of 98.5% of proteins in the human proteome A top gain-of-function scientist admitted in an interview last September that viruses can be lab engineered without leaving a trace. Professor Ralph Baric, an epidemiologist at the UNC Gillings School of Global Public Health and professor of immunology and microbiology at the UNC School of Medicine, has been studying coronaviruses for 30 years The rest is than sent back into the cloaca. Uric acid functions as a magnet to pick off free radicals. Studies have shown that reduction of uric acid in chickens increases the rate of tissue aging to a rate found in human diabetics. Other kidney functions include a precursor for the synthesis of Vitamin D3 for the absorption of calcium The anus is part of the digestive tract. It is an opening at the opposite end of the tract from the mouth, and functions to expel waste from the digestive system. The term comes from the Latin word for circle or ring, and refers to the sphincter muscle which controls the opening and closing of the anus. In mammals, solid or semisolid wastes.

Cloacal Anomalies - Children's Health Orange Count

  1. (The cloaca is an extension of the primitive gut.) Several events lead to sexual differentiation during this period. During male fetal development, the bipotential gonads become the testes and associated epididymis. The Müllerian ducts degenerate. The Wolffian ducts become the vas deferens, and the cloaca becomes the urethra and rectum
  2. Function. The alveoli. Surfactant. Other functions. Respiratory disease. Tips for good lung health. The most important function of the lungs is to take oxygen from the environment and transfer it.
  3. Cloaca: In the cloaca there is a mixing of the digestive wastes together with wastes from the uri-nary system (urates). Fecal material is usually voided as digestive waste with white uric acid crystals on the outer surface. The reproduc-tive tract also exits through this area but when a hen lays an egg the vagina folds over to allow the eg
  4. al part of the hindgut ends in the CLOACA, which is an endoderm-lined chamber that contacts the surface ectoderm at the cloacal membrane and communicates with the allantois, which is a membranous sac that extends into the umbilicus alongside the vitelline duct. The cloaca is then divided by the URORECTAL SEPTU
  5. The chicken has a typical avian digestive system. In chickens, the digestive tract (also referred to as the gastrointestinal tract or GI tract) begins at the mouth, includes several important organs, and ends at the cloaca. Figure 1 shows a chicken digestive tract, and Figure 2 shows the location of the digestive tract in the chicken's body
Excretory System | A Study In BiologyUrinary bladder | human anatomy | Britannica

The brand new 8th Cloaca, Mini Cloaca (on the left), was premiered at the Casino. The tubular structure is made of metal and glass, and composed of mechanical organs that swallow, grind, digest and defecate a given amount of food. While Super Cloaca consumes 300 kg of food and produces 80 kg of faeces per day, the quantity of food ingested by. The cloaca is the beavers only vent for excretion, reproduction, and scent discharges. This cavity is where intestinal and genitourinary tracks empty. Both scent glands empty into the cloaca. Each pair has different uses. The smaller pair are oil glands the beaver uses to waterproof their fur. Castoreum is discharged from the larger pair and is.

Persistent Cloaca: Symptoms, Causes, and Treatmen

Thus, although scientists have long discounted the human appendix as a vestigial organ, there is a growing body of evidence indicating that the appendix does in fact have a significant function as. The cloaca is an expanded, tubular structure that serves as the common opening of the digestive, reproductive and urinary systems, which opens to the outside of the bird as the vent. As in mammals, the large intestine's primary function is absorption of water and electrolytes Functions of Spleen. The main immunological function of the spleen is to filter the blood by trapping bloodborne microbes and producing an immune response to them. It is particularly important for B cell responses to polysaccharide antigens. The spleen is formed partly by lymphatic tissue which produces T lymphocytes and B lymphocytes One such trait is a cloaca. This charming-sounding orifice, from the Latin word for sewer, is the common opening for the reproductive, urinary and intestinal tracts in birds and crocodylians.

GI Histology - Week 1 - Medical Sciences Medical School

Cloaca in Embryology - Urogenital and Anal Development

The gallbladder is an organ that's found in your abdomen. Its function is to store bile until it's needed for digestion. When we eat, the gallbladder contracts, or squeezes, to send bile into. • Cloaca • Accessory organs Mechanism of Digestion in Digestive System of a Frog The digestive system of a frog starts with the mouth. Mouth helps in consumption of food. This process is known as ingestion. Frog feeds on flies or insects. As the teeth's present in frog is very week they are not useful to catch the agile prey The cloaca is the organ that allows the execution of all these functions to the extent that bird needs it. Within it are multiple folds of skin and muscle that subdivide it into cameras suitable for different uses (Lovette & Fitzpatrick, 2016) comes out. What is the function of the Eustachian tubes? PART B - INTERNAL ANATOMY: 1) Lay the frog ventral side up. Look for the opening to the frog's cloaca, located between the hind legs. Use forceps to lift the skin and use scissors to cut along the center of the body from the cloaca to the lip Reproductive organs of male ascaris include a testis, a vas deferens, a seminal vesicle, an ejaculatory duct, cloaca and penial setae. 1. Testes: Male ascaris is monorchis i.e., it has a single testis. The testes are a long, thin and coiled tube-like structure. It continues into a vas deferens

Cloacal Malformations: Practice Essentials

This is similar to the human because the human's gallbladder function is also to store bile 5. Kidney: The kidney of a frog and a human is very similar because they both are in charge of filtering the blood. 6. Cloaca: The cloaca of a frog is where all the eggs, urine, and sperm if male are located Digestive tract definition is - the tubular passage typically extending from the mouth to the anus or cloaca that functions in digestion and absorption of food and elimination of residual waste and that in most mammals includes the mouth, pharynx, esophagus, stomach, intestine, and anus —called also alimentary canal, alimentary tract of the urinary duct, in amphibians and bladder-possessing reptiles (Sphenodon, turtles, most lizards) as a pocket in the cloaca. Urinary bladder | human anatomy | Britannica Urinary bladder (sagittal view) The urinary bladder is an organ that serves to collect urine to be voided through urination after the urine is filtered through the kidneys.

The Dogfish Shark—Structure and FUNction! Carolina

The Cloaca Maxima in Rome was not part of a master plan to sanitize the city. Its purpose was removing water that pooled on the city's uneven streets and draining water from low-lying areas when. The cloaca is a small, median chamber that is used to pass faecal matter, urine and sperms to the exterior. 4. REPRODUCTIVE ORGANS OF FEMALE FROG In the female frog the principal reproductive organs are a pair of ovaries and the accessory reproductive organs are : 1. A pair of Oviducts, 2. Cloaca and 3

Notes: AmphibiansTalking heads: what toilets and sewers tell us about

Tschopp isn't sure why the cloaca locations are different in these two types of animals, but he hopes to find out. And a better understanding of how signal location affects embryo development. Cloaca: Where sperm, eggs, urine, and feces exit. (Execretory) **The reproductive system and urinary system collectively is call the urogenital system. 9. The urinary system consists of the FROG'S KIDNEYS,URETERS, URINARY BLADDER, AND CLOACA The kidneys are organs that filter wastes from the blood and excrete urine. Connected to each kidney. Cloaca - This is the exit from the digestive tract combined with being the opening for the sex organs. The cloaca lies between the pelvic fins. 7. Clasper - Found on male sharks only, these are finger-like extensions of the medial edge of each pelvic fin. They may have a single spine associated with each clasper