cloaca


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cloaca

 [klo-a´kah] (pl. cloa´cae) (L.)
1. a common passage for fecal, urinary, and reproductive discharge in most lower vertebrates.
2. in mammalian embryos, the terminal end of the hindgut before division into rectum, bladder, and the primordia of the reproductive organs.
3. an opening in the covering or sheath of a necrosed bone. adj., adj cloa´cal.

clo·a·ca

(klō-ā'kă),
1. In early embryos, the endodermally lined chamber into which the hindgut and allantois empty.
2. In birds and monotremes, the common chamber into which open the hindgut, bladder, and genital ducts.
[L. sewer]

cloaca

(klō-ā′kə)
n. pl. cloa·cae (-sē′)
Zoology
a. The common cavity that serves as the opening for the intestinal, genital, and urinary tracts in many vertebrates, including amphibians, reptiles, birds, monotremes, and some fishes.
b. The posterior part of the intestinal tract in various invertebrates.

clo·a′cal (-kəl) adj.

cloaca

Embryology
The terminal hindgut before it divides into the rectum, bladder and genital primordia.
 
Pathology
An obsolete term for an opening in the involucrum of necrotic bone.
 
Zoology
A common conduit in most lower vertebrates for faecal, urinary and reproductive discharge.

clo·a·ca

, pl. cloacae (klō-ā'kă, -sē)
1. In early embryos, the endodermally lined chamber into which the hindgut and allantois empty.
2. In birds and monotremes, the common chamber into which the hindgut, bladder, and genital ducts empty.
[L. sewer]

cloaca

The combined urinary and faecal opening in the embryo before the two become separated. The term derives from the Latin cloaca a sewer.

cloaca

the terminal part of the gut system of most vertebrates (except higher mammals) into which the ducts from the kidney and reproductive system open. In these types there is thus only one posterior aperture to the body as compared with two in mammals, the anus and the opening of the urinogenital system. In some vertebrates, such as birds, the cloaca is reversible and forms a penis-like structure in the males during copulation.
References in periodicals archive ?
The edges of the defect in the rectus abdominus were isolated and fibrous adhesions to the peritoneum, cloaca, and intestine were identified.
The PLC (programmable logic controller) of the first Cloaca [Fig.
Esta limpieza y recomposicion de la cloaca privada se considera de utilidad publica, por lo que esta permitida aun cuando se realice con violencia, clandestinidad o precariedad (D.
Nephrons empty into collecting ducts that exit the kidney and communicate with the Wolffian duct or the cloaca. The collecting ducts communicate with the Wolffian ducts along the entire length of the pelvic kidneys in the Proteidae (Chase, 1923; Rosenquist and Baker, 1967) and Sirenidae (Willett, 1965).
However, this method has the potential to cause damage as a modified nasal speculum is used to probe the cloaca. Measurement of pelvic spread has been used successfully by satterlee and Marin (2004) in Japanese quail (Coturnix japonica) to determine the state of sexual development of females.
La recuperacion viral se logro a partir de hisopados de cloaca a los 7 dias postinoculacion.
In general, courtship in snakes involves an initial approach, juxtaposition of male's and female's cloaca and the insertion of one hemipenis, a pattern that is enriched by a diversity of behaviors (e.g.
Berrang, Northcutt, and colleagues determined that the increase is caused by escape of highly contaminated fecal matter from the cloaca (lower gut) during feather removal.
Professor Stefan Rhein, director of the Luther Memorial Foundation, told the Telegraph he believes Luther was sitting precisely on this pot when he crafted one of the biggest movements in modern history, citing Luther's frequent talk of constipation and a reference to writing the Theses in cloaca (Latin for "sewer").
He is currently starring in Cloaca, Kevin Spacey's first play as artistic director at The Old Vic Theatre.