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

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

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

[klō·ā′kə] pl. cloacae
Etymology: L, sewer
1 (in embryology) the end of the hindgut before the developmental division into the rectum, the bladder, and the primitive genital structures.
2 (in pathology) an opening into the sheath of tissue around a necrotic bone.

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.

cloaca

perforation of bone cortex in osteomyelitis, through which pus escapes, to form a Brodie's abscess

cloaca

pl. cloacae [L.]
1. a common passage for fecal, urinary and reproductive discharge in most lower vertebrates.
2. the terminal end of the hindgut before division into rectum, bladder and genital primordia in mammalian embryos.
3. an opening in the involucrum of a necrosed bone.

avian cloaca
in birds the cloaca is divided into three poorly defined compartments: a coprodeum or a continuation of the rectum, a urodeum into which the urogenital ducts open (in the female the left genital duct is the oviduct) and the proctodeum which carries the cloacal bursa and the proctodeal glands.
common cloaca
the urorectal septum fails to develop; defecation and urination share a common cavity. Seen in Manx cat.
References in periodicals archive ?
The occurrence of exstrophy of the bladder appears to be more common (1:30 000 to 1:40 000) than exstrophy of cloaca (1:200.
El unico caracter morfologico que se puede reconocer para diferenciar machos de hembras es el abultamiento de la cloaca en los machos, debido principalmente a la gran actividad glandular para la elaboracion del espermatoforo, mientras que en las hembras esta es plana y es mas pequena.
After rest stops in Antwerp, Vienna, and Zurich, Cloaca, still the property of its inventor (who recently refused to sell it to a diaper company that hoped to use it for tests), will journey to the New Museum in New York this January.
Whole-body radiographs were taken and revealed increased soft tissue opacity without mineralization in the area of the cloaca (Figure 1).
Respecto a su libro, comento que quiso ver a Estados Unidos a traves de los ojos de un joven musulman devoto e ingenuo, "no como un alma mater sino como una cloaca obscena, llena de podredumbre y de extravagancias sexuales".
The abnormal tissue was adhered to the cloacal serosa, causing deviation of the cloaca caudally and ventrally.
Cloacoscopy provided an excellent view of the cloaca and appeared to be well tolerated; however, biopsy of the bursa of Fabricius is not recommended because of poor diagnostic value of the specimens and the risk of cloacal perforation.
Algo similar ha pasado con el PP, X) que es hoy una pestilente cloaca de todo tipo de excesos, negocios sucios y fraudes, manejados por organizaciones mafiosas que tienen secuestrado al PRD, vinculadas a la prostitucion y encabezadas por prominentes jefes del PRD.
No tanto como para decir, segun algunos datos a los terminos rimbombantes, que "se destapo la caja de Pandora", pues los protagonistas y los antagonistas del relajo no tienen tamano para eso; pero si dejar la cloaca al descubierto.
5] WNV plaque forming units per ml serum) within 5 days postinoculation (DPI), and/or shed virus per os or per cloaca.
La pelicula sigue fielmente el genero negro: el destape de una cloaca, la del cuerpo a cuyo cargo esta el cuidado de la justicia, por medio, simplificando, de un policia "malo" pero eficaz y otro "bueno" pero ineficaz, ambos terminan actuando exactamente igual y detras de ellos la gran cloaca de jefes corruptos, como el capitan Dudley Smith (James Cromwell) --quien aparenta ser un jefe vigilante, sabio y pragmatico--, grandes prostitutas dobles de estrellas del Hollywood vecino.
A 42-year-old African grey parrot (Psittacus erithacus) weighing 358 g and of unknown gender was presented to the Division of Zoo Animals and Exotic Pets of the University of Zurich with a 2-year history of a nonhealing skin wound involving the cloaca, cloacitis, and recurrent cloacal impaction.