Sphincter of the Anus Internal

Internal anal sphincter: anatomy and functions

The internal anal sphincter is a circular muscle located inside the anus that controls the exit of the rectum. It is one of two sphincters that regulate the act of defecation.

Anatomy of the internal anal sphincter

The internal anal sphincter is located around the anus. It consists of a circular muscle that surrounds the rectum and anal canal. The muscle fibers of the internal anal sphincter wrap around the anus and create a circumferential tension that holds feces inside the rectum.

Functions of the internal anal sphincter

The internal anal sphincter controls the exit from the rectum. When the sphincter muscles contract, they reduce the diameter of the anus, which helps keep stool inside the rectum. When the muscles relax, the anus widens, allowing stool to pass out of the rectum.

The internal anal sphincter also plays an important role in maintaining continence. When the sphincter muscles contract, they create an airtight seal that prevents stool or gas from escaping from the rectum.

Various conditions can affect the function of the internal anal sphincter. For example, if the rectum is irritated or inflamed, the sphincter muscles may become more tense, which can lead to pain or difficulty defecating. Certain medical conditions, such as hemorrhoids or anal fissure, can also affect the function of the internal anal sphincter.

conclusions

The internal anal sphincter plays an important role in controlling the act of defecation and maintaining continence. It is an important anatomical structure that regulates the exit from the rectum. Various conditions can affect the function of the internal anal sphincter, which can lead to painful or difficult symptoms. Therefore, it is important to see a doctor if you have problems with the function of the internal anal sphincter.

The topic of our presentation is “The internal sphincter of the anus.” It is very important to know how it works and its interaction with other organs of the body.

Sphincters are special muscles in the body that allow us to control the movement of food in the esophagus and intestines. However, the anus also has an internal sphincter, which is located inside the sphincter and helps keep bowel movements under control. It is a round muscle that narrows the opening to the anal canal and prevents it from relaxing during bowel movements. The internal sphincterium plays an important role in the functioning of the anus, as it helps to avoid the involuntary release of gases and liquids from the intestines. In addition, examination of the internal sphincter can be useful for diagnosing various diseases of the gastrointestinal tract. According to statistics, about 69% of the population have problems with internal anal sphinctia. Thus, it is very important to know about its features and interactions with other internal organs of the body.