IMMUNOLOGY

Detailed explanation-1: -The body expels waste products from digestion through the rectum and anus. This process, called defecation, involves contraction of rectal muscles, relaxation of the internal anal sphincter, and an initial contraction of the skeletal muscle of the external anal sphincter.

Detailed explanation-2: -The large intestine (large bowel) absorbs chemicals (such as sodium and chloride), nutrients, and water from the digested food. It also prepares waste (stool) to be expelled from the body. The large intestine is also called the colon.

Detailed explanation-3: -The food molecules that cannot be digested or absorbed need to be eliminated from the body. The removal of indigestible wastes through the anus, in the form of feces, is defecation or elimination.

Detailed explanation-4: -The primary function of the rectum is to collect and hold your poop until it’s time to release it. Your rectum relaxes and stretches to accommodate the waste as it gradually comes in from your colon.