Is the appendix useful or not?

The appendix is a degenerate organ of human beings (the appendix of herbivores is very developed), which is about 7-9 cm long and 0.5 cm in diameter, and is located at the lower right of the abdomen. Because the appendix cavity is small and blind, food residues and fecal stones are easy to fall into the cavity, blocking the cavity and causing inflammation. It used to be thought that the appendix was a piece of intestine with no physiological function left by human evolution, and it was inflamed, which led to the disease, so it was surgically cut off and dumped as soon as it became inflamed. Lauren Martin, a professor of physiology at Oklahoma State University, recently pointed out through research that the appendix plays an important role in fetus and adolescence. When the human embryo develops to about 1 1 week, endocrine cells appear in the appendix. These endocrine cells in the fetal appendix produce various biogenic ammonia and peptide hormones, as well as compounds that contribute to the biological control (self-balance) mechanism. The function of the appendix also includes making white blood cells act on various antigens or foreign bodies existing in the gastrointestinal tract, so that the appendix may inhibit humoral antibody reactions that destroy blood and lymph, and promote local immune function. The appendix is also like a thin small structure of Pyle lymph collection in other parts of the gastrointestinal tract-absorbing antigens from intestinal contents and reacting to these contents. This local immune system plays an important role in biology and control of food, drugs, microorganisms and virus antigens. The relationship between these local immune systems and intestinal inflammation and autoimmune reactions related to the systemic immune system is still under study. In view of these physiological functions of the appendix, scientists call on people to treat the appendix well and not to cut it off easily.