Itching of the anus the opening at the end of the digestive tract where stool leaves the body and the skin around the anus perianal skin is called anal itching or pruritus ani. See also Overview of the Anus and Rectum. Most often, doctors do not identify a specific disorder as the cause of anal itching, and the itching goes away without treatment after a period of time. Many of the other cases of anal itching are due to hygiene issues. Only a very few cases are caused by a specific disorder see Table: Causes and Features of Anal Itching , such as pinworms or a fungal infection.
Digestive System (for Parents) - Nemours Kidshealth
Source: National Cancer Institute Research, www. The gastrointestinal GI tract is part of the digestive system, which processes nutrients vitamins, minerals, carbohydrates, fats, proteins, and water in foods that are eaten and helps pass waste material out of the body. The GI tract includes the stomach and intestines bowels. The stomach is a J-shaped organ in the upper abdomen. Food moves from the throat to the stomach through a hollow, muscular tube called the esophagus. After leaving the stomach, partly-digested food passes into the small intestine and then into the large intestine.
The digestive system is made up of the digestive tract - a series of hollow organs joined in a long, twisting tube from the mouth to the anus - and other organs that help the body break down and absorb food see figure. Organs that make up the digestive tract are the mouth, esophagus, stomach, small intestine, large intestine - also called the colon - rectum, and anus. Inside these hollow organs is a lining called the mucosa.
The rectum is a chamber that begins at the end of the large intestine, immediately following the sigmoid colon, and ends at the anus see also Overview of the Anus and Rectum. Ordinarily, the rectum is empty because stool is stored higher in the descending colon. Eventually, the descending colon becomes full, and stool passes into the rectum, causing an urge to move the bowels defecate. Adults and older children can withstand this urge until they reach a bathroom. Infants and young children lack the muscle control necessary to delay bowel movement.