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Appendix

A 4-inch pouch attached to the cecum, the first part of the large intestine. The appendix's function, if any, is unknown.

PubMed Health Glossary
(Source: NIH - National Institute of Diabetes and Digestive and Kidney Diseases)

Drawing of the small intestine showing the duodenum, jejunum, and ileum. Also shown are the stomach, appendix, colon, and rectum. Click to enlarge

The small intestine and nearby organs National Institutes of Health

Terms to know

Appendectomy
Surgery to remove the appendix (small finger-shaped pouch at the end of the first part of the large intestine).
Colon (Bowel)
The longest part of the large intestine, which is a tube-like organ connected to the small intestine at one end and the anus at the other. The colon removes water and some nutrients and electrolytes from partially digested food. The remaining material, solid waste called stool, moves through the colon to the rectum and leaves the body through the anus.
Duodenum
The first part of the small intestine that connects to the stomach.
Ileum
The lower end of the small intestine.
Jejunum
The middle section of the small intestine between the duodenum and ileum.
Rectum
The last several inches of the large intestine closest to the anus.
Small Intestine
The organ where most digestion occurs. It measures about 20 feet and includes the duodenum, jejunum, and ileum.
Stomach
An organ that is part of the digestive system. The stomach helps digest food by mixing it with digestive juices and churning it into a thin liquid.

Related conditions

Terms to know

Appendectomy
Surgery to remove the appendix (small finger-shaped pouch at the end of the first part of the large intestine...
Colon (Bowel)
The longest part of the large intestine, which is a tube-like organ connected to the small intestine at one e...
Duodenum
The first part of the small intestine that connects to the stomach....
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