The description in the appendix is correct.

The description of the appendix is correct: the appendix is usually located in the right iliac fossa with cecum, and its length varies from person to person.

The position of appendix mainly depends on the position of cecum. Usually, the appendix and cecum are located in the right iliac fossa. In a few cases, with the change of cecum position, ectopic appendix may appear.

The length of the appendix varies from person to person, generally 5-7cm long, divided into root, base and end. The root is the confluence of three colon bands of cecum, which is constant, mostly about 2cm below the ileocecal orifice and at the opening of cecum. There is a crescent-shaped mucosal fold at the opening, which is called an appendix flap. The appendix flap can prevent fecal debris and foreign bodies from entering the appendix cavity. The appendix is covered by peritoneum, with mesentery and good fluidity.

Children's appendix is wide at the bottom, funnel-shaped and small at the top. The peritoneum around the appendix forms a triangular double-layer mesentery, which is located in the lower part of the ileum. Because the appendix is short, its mesentery is long, and the appendix is mostly curly.

Function:

1, immune function

The appendix is an organ related to immunity, especially in childhood and youth, which has developed lymphoid tissue, including many follicles, which can differentiate and transmit immunocompetent lymphocytes. It is the place where B cells are produced. B cells can participate in cellular immunity and secrete intestinal immunoglobulin, which can play an effective barrier role in protecting the host and inhibiting foreign bacteria.

Although the appendix has immune function, in adulthood, this kind of immunocompetent lymphocytes have settled in the lymph nodes and spleen of the whole body, replacing the function of lymphatic follicles in the appendix.

2, storage and peristalsis function

The appendix stores a large number of intestinal probiotics, which can help intestinal digestion and help the human body fully absorb nutrients. In addition, the appendix can absorb water and electrolyte, has the function of peristalsis, and can discharge the contents and fecal particles entering the appendix cavity.