Final answer:
The peritoneum spaces in the pelvis include two pouches in males and females. The pouch that can be drained through the posterior fornix is the rectouterine pouch.
Step-by-step explanation:
The peritoneum spaces in the pelvis are divided into two pouches for both males and females. In males, these pouches are called the rectovesical pouch and the vesicouterine pouch. In females, they are called the rectovesical pouch and the rectouterine pouch. The pouch that can be drained through the posterior fornix is the rectouterine pouch.