Where is the male sphincter?

The sphincter is a very important muscle group in the human body, because the existence of the sphincter can keep the body in a normal state of operation. The sphincter in the body is mainly located in the gastrointestinal digestive system. For example, the anus is mainly composed of sphincters. If there is a problem with the sphincter, it will affect the normal contraction function of the anus. So for male friends, in addition to the anus, what other parts have sphincters?

1. The sphincter is not a single muscle. It is a group of different muscles in many parts of the body, such as the digestive system, sacral sphincter, pyloric sphincter, or male genital base. According to your description, it should be the male genital muscles. It is recommended to contract them voluntarily 100 to 200 times a day. If you persist for many years, your sexual function will improve.

2. The main sphincters are

(1) The pyloric sphincter at the outlet of the stomach, which limits the amount of food discharged with each gastric peristalsis and prevents the contents of the duodenum from flowing back into the stomach.

(2) The ileocecal sphincter at the junction of the terminal ileum and the cecum can prevent the contents of the ileum from being discharged into the cecum; prevent the contents of the ileum from entering the large intestine too quickly, prolong the residence time of chyme in the small intestine, facilitate the complete digestion and absorption of the contents of the small intestine, and prevent the contents of the large intestine from flowing back into the ileum.

(3) There is an internal urethral sphincter at the junction of the urethra and the bladder. When it contracts, it can close the internal urethral opening and prevent urine from leaking out. There is a urethral sphincter in the membranous part of the urethra (urogenital diaphragm). It is composed of striated muscles and is controlled by consciousness.

(4) In the anal canal, there is a strong muscle ring called the anorectal ring, which is composed of the internal anal sphincter, the superficial and deep external anal sphincter, the levator ani muscle, and the longitudinal rectal muscle. This ring plays an extremely important sphincter role in the anal canal, and damage will lead to fecal incontinence. The internal anal sphincter has no sphincter function and only assists in defecation. The external anal sphincter is composed of striated muscles, which are controlled by consciousness and relax during defecation.