Anus

Definition

The anus is the terminal end of the digestive tract through which feces are expelled from the body. It is controlled by two sphincters, the internal and external anal sphincters, which regulate defecation.

5 Must Know Facts For Your Next Test

1. The anus is composed of both internal and external sphincters that control the passage of feces.
2. The internal anal sphincter is involuntary while the external anal sphincter is under voluntary control.
3. The health of the anorectal area can be affected by diet, hydration, and physical activity.
4. Common disorders associated with the anus include hemorrhoids, anal fissures, and incontinence.
5. Proper nutrition and fiber intake play a crucial role in maintaining healthy bowel movements.

Review Questions

• What are the two types of sphincters found in the anus and how do they function?
• How does diet influence the health of the anorectal area?
• Name two common disorders associated with the anus.

Related terms

rectum: The final section of the large intestine that stores feces before they are expelled through the anus.

sphincter: A ring-like muscle that controls the opening and closing of a bodily passage or orifice.

defecation: The process of eliminating feces from the digestive tract through the anus.