Question

The primary function of the anus is to ________.

a. open to allow passage of waste materials
b. control functioning of the colon
c. store waste materials prior to evacuation
d. store digestive hormones until they are needed
e. absorb excess water from waste materials

Answer 1

The anus is the exit point for waste materials, allowing them to pass out of the body, and is regulated by two sphincters. The rectum stores feces, not the anus. Correct option is a)

Step-by-step explanation:

The primary function of the anus is to open to allow passage of waste materials. The anus is the final opening at the far end of the digestive tract, serving as the exit point for the waste material. Two sphincters, an involuntary inner sphincter and a voluntary outer sphincter, regulate the passage of feces through the anus. It is important to note that the storage of feces prior to evacuation occurs in the rectum, not the anus. Hence, the correct answer to the question is 'a. open to allow passage of waste materials'.