What are the five parts of the large intestine?
May 14, 2023
Source: Cainiu Health
Dr. Zhou Chao
Introduction
The large intestine can be divided into five parts: the cecum, appendix, colon, rectum, and anal canal. Here is a detailed analysis: The cecum is the beginning portion of the large intestine, typically located in the right iliac fossa. It has a sac-like shape and is the shortest segment of the large intestine, playing a role in preventing the backflow of colonic contents. The appendix is a narrow, tube-like structure situated between the ileum and the cecum. It is closed at one end and capable of secreting digestive enzymes.
The large intestine can be divided into five parts: the cecum, appendix, colon, rectum, and anal canal. The details are as follows:
1. Cecum
The cecum is the beginning portion of the large intestine, typically located in the right iliac fossa. It has a sac-like shape and is the shortest segment of the large intestine. It helps to some extent prevent backflow of contents from the large intestine.
2. Appendix
The appendix is a narrow, blind-ended tube situated between the ileum and the cecum. It remains closed and can secrete digestive enzymes to help maintain the balance of intestinal flora.
3. Colon
The colon lies in the right iliac fossa near the cecum and includes the ascending colon and transverse colon. The transverse and ascending colons absorb water, sodium, and other substances while secreting mucus, whereas other parts of the colon serve to store and eliminate feces.
4. Rectum
The rectum connects superiorly with the sigmoid colon and inferiorly with the anus. It helps the body eliminate waste materials that remain within it.
5. Anal Canal
The anal canal extends from the dentate line to the anal margin. When not defecating, the anal sphincter muscle contracts to prevent leakage of feces and other contents. During defecation, it relaxes to assist in expelling feces.
In daily life, it is important to maintain cleanliness around the anus to avoid diseases that may affect health. If any discomfort occurs in the above-mentioned areas, prompt medical examination is essential.
