cloaca (klōā`kə), in biology, enlarged posterior end of the digestive tract of some animals. The cloaca, from the Latin word for sewer, is a single chamber into which pass solid and liquid waste materials as well as the products of the reproductive organs, the gametes. Cloacas are found in amphibians, reptiles, birds, and lower mammals; higher mammals have a separate rectal outlet, the anus. The term cloaca is also used for analogous chambers in many invertebrates, such as worms of the phylum Nematoda Nematoda , phylum consisting of about 12,000 known species, and many more predicted species of worms (commonly known as roundworms or threadworms). Nematodes live in the soil and other terrestrial habitats as well as in freshwater and marine environments.
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cloaca

In vertebrates, common chamber and outlet into which the intestinal, urinary, and genital tracts open. It is present in amphibians, reptiles, birds, some fishes (e.g., sharks), and monotreme mammals but is absent in placental mammals and most bony fishes. Certain animals (e.g., many reptiles and some birds, including ducks) have an accessory organ (penis) within the cloaca that is used to direct the sperm into the female's cloaca. Most birds mate by joining their cloacas in a “cloacal kiss”; muscular contractions transfer the sperm from the male to the female.

cloaca

a cavity in the pelvic region of most vertebrates, except higher mammals, and certain invertebrates, into which the alimentary canal and the genital and urinary ducts open

cloaca [klō′ā·kə]

(invertebrate zoology)

The chamber which functions as a respiratory, excretory, and reproductive duct in certain invertebrates.

(vertebrate zoology)

The chamber which receives the discharges of the intestine, urinary tract, and reproductive canals in monotremes, amphibians, birds, reptiles, and many fish.

cloaca

An underground conduit for drainage; a sewer, esp. in ancient Rome.

Cloaca

the broadened extremity of the hindgut of some vertebrate animals. The wall of the cloaca is covered with a many-layered epithelium. The ureter, the genital ducts (sperm ducts or oviducts), and the urinary bladder open into the cloaca. It is found in certain cyclostomes (hagfish) and fishes (sharks, skates, dipnoans and pipefish) and in all amphibians, reptiles, and birds. The cloaca is found in mammals of the subclass Prototheria. In other mammals a cloaca is found only in the early embryonic stage of development; it subsequently divides into the urogenital sinus and the terminal part of the rectum, which have separate urogenital and anal openings. In amphibians the urinary bladder is formed from an evagination of the abdominal wall of the cloaca. Allantoides appear in the embryo of amniotes.

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No references found	John Lateran, the Campagna, the Appian Way, the Seven Hills, the Baths of Caracalla, the Claudian Aqueduct, the Cloaca Maxima--the eternal bore designed the Eternal City, and unless all men and books do lie, he painted every thing in it The Innocents Abroad by Twain, Mark View in context After working an hour I began to speculate on the distance one had to go before the cloaca was reached, the chances we had of missing it altogether. The War Of The Worlds by Wells, H.G. View in context	Clique clisere CLISP Clisson, Olivier de CLIST Clisthenes Clitellata clitellum clithral Clitopilus Prunulus clitoris Clitunno River Clive Clive Sinclair Clive, Kitty Clive, Robert Clive, Robert, 1st Baron Clive, Robert, Baron Clive of Plassey Clivia clivvy CLIX CLKG CLM CLNP clo Cloaca cloacal bladder cloacal gland cloak rail cloaking cloakroom CLOB clobber clobbering memory clochan cloche clocher clock Clock and Watch Industry clock control system Clock Correction Clock Diagram clock doubling Clock Drive clock frequency clock gene clock method clock motor clock oscillator clock paradox clock pulse	CLNGG CLNH CLNHA CLNI CLNIP CLNJ CLNLP CLNM CLNN CLNOM CLNP CLNP CLNR CLNS CLNT CLNTA CLNTU CLNW CLNWR CLNY CLO CLO CLO CLO test CLO/LO CLOA CLOAC Cloaca Cloaca (embryology) cloaca exstrophy cloaca exstrophy cloaca exstrophy Cloaca Maxima cloacae cloacae cloacae cloacal cloacal cloacal cloacal bladder cloacal bursa cloacal bursa cloacal bursa Cloacal exstrophy Cloacal exstrophy Cloacal exstrophy cloacal fold cloacal gland cloacal kiss cloacal kiss cloacal membrane cloacal membrane cloacal membrane cloacal plate cloacal plate cloacal plate cloacal prolapse cloacal prolapse

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John Lateran, the Campagna, the Appian Way, the Seven Hills, the Baths of Caracalla, the Claudian Aqueduct, the Cloaca Maxima--the eternal bore designed the Eternal City, and unless all men and books do lie, he painted every thing in it

The Innocents Abroad by Twain, Mark View in context

After working an hour I began to speculate on the distance one had to go before the cloaca was reached, the chances we had of missing it altogether.

The War Of The Worlds by Wells, H.G. View in context

Cloaca playV2('en/UK/dk/dkdgd3sjdfdydsh7')

cloaca

Cloaca