Large intestine

Definition

The large intestine is the final segment of the digestive system, responsible for absorbing water and electrolytes from indigestible food matter. It also compacts waste into feces for elimination.

5 Must Know Facts For Your Next Test

1. The large intestine includes the cecum, colon, rectum, and anal canal.
2. Bacteria in the large intestine play a crucial role in breaking down remaining nutrients.
3. The primary function of the large intestine is to absorb water and salts from the material that has not been digested as food.
4. The large intestine does not produce digestive enzymes; instead, it relies on bacterial flora to break down substances.
5. Approximately 1.5 meters (about 5 feet) in length, it is shorter but wider than the small intestine.

Review Questions

• What are the main sections of the large intestine?
• What role do bacteria play in the large intestine?
• How does the large intestine contribute to maintaining body fluid balance?

Related terms

smallIntestine: A part of the digestive tract where most digestion and nutrient absorption occur before reaching the large intestine.

cecum: The beginning part of the large intestine that connects with the ileum of the small intestine.

rectum:

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