What is cloacae?

Cloacae (klow-A-kie) is plural for cloaca (klow-A-ka.) The Word cloaca is the Latin Word for sewer.

It is the ventral opening in reptiles, amphibians, birds and some mammals. It is sort of an all purpose hole. The digestive tract ends there (we humans have two openings for this.) Sexual reproduction also takes place there (we female humans have an additional opening for this.)