Explore: Cloaca (zoology)

A cloaca (/kloʊˈeɪkə/ kloh-AY-kə), pl.: cloacae (/kloʊˈeɪsi/ kloh-AY-see or /kloʊˈeɪki/ kloh-AY-kee), or vent, is the rear orifice that serves as the only

phallodeum, and inserting it into the female cloaca. The paired Müllerian glands inside the male cloaca secrete a fluid which resembles that produced

organ used to transfer sperm into the female genital tract (i.e., vagina or cloaca) for potential fertilization. The penises of different animal groups are

underneath, and no tail (the "tail" of tailed frogs is an extension of the male cloaca). Frogs have glandular skin, with secretions ranging from distasteful to

retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca. Lizards have independently evolved elongate bodies without limbs or with

coil around one female and attempt to position themselves as close to her cloaca as possible where they use their pelvic spurs to "tickle" and encourage

internal reproductive organs differ, both sexes possess an identical single cloaca opening for urination, defecation, and mating. Male echidnas have non-venomous

words μονός (monós 'single') and τρῆμα (trêma 'hole'), referring to the cloaca. Like other mammals, monotremes are endothermic with a high metabolic rate

sub-family of boas) possess pelvic or anal spurs on each side of their cloaca. These spurs have a high degree of mobility and can be moved by appropriate

imitate caterpillars, a prey of birds. The adult parasite lives in the bird's cloaca, releasing its eggs into the faeces. The species in Leucochloridium share