cloaca

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Related to cloacal: cloacal membrane

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 NematodaNematoda
, 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; some live on the deep
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.

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.

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

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
References in periodicals archive ?
Respiratory frequency and cloacal temperature in broiler chickens submitted to high cyclic ambient temperature.
For both H5 and H9 subtypes, the prevalence of positive pools was higher for oropharyngeal samples (8.6% for H5 and 31.9% for H9) than for cloacal samples (3.6% and 9.9%) in all surveyed poultry types (online Technical Appendix 2 Table 1).
Prevalence of Salmonella spp in cloacal, fecal, and gastrointestinal mucosal samples from wild North American turtles.
The challenge virus could not be detected in the cloacal swabs of vaccinated chickens, except one chicken with moderate level of shedding at day 6 pch.
A vaginal septum is the most common vaginal abnormality and is seen in as many as one-half of girls born with a cloacal malformation.
Knutzen, "Primary adenocarcinoma of the vulva originating in misplaced cloacal tissue," Obstetrics and Gynecology, vol.
(2003), verificou-se que as aves dentro das caixas de embalagem de transporte estavam sofrendo um estresse termico por frio, como pode ser comprovado tambem pelas variaveis fisiologicas (frequencia respiratoria, temperatura cloacal e temperatura de superficie) evento passivel de ser justificado pela renovacao de ar da sala de espera que esteve fora da faixa ideal, mesmo com as condicoes microclimaticas ideais; este excesso de troca de ar da sala pode ter provocado um estresse por frio nos pintos de um dia.
No virus was recovered from cloacal sample on both days.
Portanto, tal uso do solo e considerado potencialmente poluidor pelos autores Foster e Hirata (1993), tendo como uma das solucoes para esses efluentes, a instalacao de redes coletoras de esgoto cloacal, que destinam os rejeitos domesticos para uma estacao de tratamento de esgotos.
Emily Gullane was born with a complex condition called Cloacal
Los datos procesados para este trabajo fueron los siguientes: fecha, sexo, tipo de microhabitat, hora de captura, temperatura cloacal ([T[grados].sub.C]), temperatura del sustrato ([T[grados].sub.S]), temperatura del aire ([T[grados].sub.A]) y altitud en metros sobre el nivel del mar.