8. What do you call the opening at the end of digestive tract where undigested materials are excrted.

A. Anus

B. rectum

C.small intestine

D.large intestine

The anus is an opening at the far-end of the digestive tract and is the exit point for the waste material. Two sphincters regulate the exit of feces, the inner sphincter is involuntary and the outer sphincter is voluntary

Answer:

B. is answer rectum

Explanation:

the rectum is opening at the end of digestive system