Alimentary canal

Definition

The alimentary canal is the continuous, muscular digestive tube that extends from the mouth to the anus. It is responsible for nutrient absorption and waste elimination.

5 Must Know Facts For Your Next Test

1. The alimentary canal includes organs such as the mouth, pharynx, esophagus, stomach, small intestine, and large intestine.
2. It plays a critical role in both mechanical and chemical digestion of food.
3. Peristalsis is the involuntary muscle movement that propels food through the alimentary canal.
4. The small intestine is where most nutrient absorption occurs within the alimentary canal.
5. The lining of the alimentary canal contains specialized cells for secretion and absorption.

Review Questions

• What are the main functions of the alimentary canal?
• Which organs are part of the alimentary canal?
• How does peristalsis contribute to digestion in the alimentary canal?

Related terms

Peristalsis: Involuntary contractions that move food through the digestive tract.

Small Intestine: Part of the gastrointestinal tract where most nutrient absorption occurs.

Digestion: The process by which food is broken down into absorbable units.