The cloaca is also used in the urinary and reproductive system.
Explanation:
The cloaca is a chamber into which the digestive , urinary and reproductive tracts discharge contenst. The cloaca is formed at around 21 days' gestation in all human embryos up to week 4-6 , then it is partitioned into the urogenital sinus and the rectum.
In some cases malformations in the embryonic development lead to a birth defect called persistent cloaca. In this malformation the rectum, vagina, and urinary tract are fused and create a common channel.
