cloaca

in zoology
https://doi.org/10.1351/goldbook.10537

Common cavity at the end of the digestive tract in vertebrates (apart from most mammals) into which are released both excretory and genital products.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 737 [Terms] [Paper]