Anal canal

Definition

The anal canal is the final segment of the large intestine that connects the rectum to the anus, facilitating the expulsion of feces from the body. It is typically about 2 to 4 cm long in adults and contains specialized muscles and mucous membranes.

Related terms

Rectum:

The last major part of the large intestine leading to the anal canal, acting as a temporary storage site for feces before they are expelled.

Sphincters:

Circular muscles that encircle and control openings within the body; in context, anal sphincters help control the passage of feces out of the body.

Defecation:

The process of expelling feces from the rectum through the anal canal and out of the body