Rectum

Definition

The rectum is the final section of the large intestine, terminating at the anus. It plays a key role in storing feces before they are excreted from the body.

5 Must Know Facts For Your Next Test

1. The rectum contains a rich microbiota that plays a crucial role in maintaining gut health and protecting against pathogens.
2. It is approximately 12 centimeters long and connects the sigmoid colon to the anal canal.
3. Rectal mucosa has specialized cells that absorb water and electrolytes from fecal matter.
4. Rectal infections can be caused by bacteria, viruses, fungi, or parasites and can lead to serious complications if untreated.
5. Common symptoms of rectal infections include pain, bleeding, discharge, and changes in bowel habits.

Review Questions

• What is the primary function of the rectum in the digestive system?
• How does the rectal microbiota contribute to gut health?
• What are common symptoms associated with rectal infections?

Related terms

anus:

The opening at the end of the digestive tract through which feces are expelled.

sigmoid colon: The S-shaped last part of the large intestine leading into the rectum.

mucosa: A membrane lining various cavities in the body and covering internal organs.