In animal anatomy, a cloaca kloh-AY-kə is the posterior orifice that serves as the only opening for the digestive, reproductive, and urinary tracts of many vertebrate animals.

What is the cloaca in humans?

A cloaca is a common chamber into which some or all of the digestive, urinary, and reproductive tracts discharge their contents. A cloaca exists in all human embryos up to 4–6 weeks, at which time it becomes partitioned into the urogenital sinus and the rectum.

What is a cloaca and what does it represent?

Cloaca: A common passageway for feces, urine and reproduction. At one point in the development of the human embryo, there is a cloaca. It is the far end of a structure called the hindgut. ... The presence of a cloaca is normal in many adult animals (birds, reptiles, amphibians, some fish, and even a few mammals).