Gastrointestinal tract
The small intestine begins at the duodenum and is a tubular structure, usually between 6 and 7 m long. Its mucosal area in an adult human is about 30 m. Its main function is to absorb the products of digestion (including carbohydrates, proteins, lipids, and vitamins) into the bloodstream. There are three major divisions:
Kidney dish
Generally, the volume of a pulp kidney dish (or "vomit dish") is 700 ml. Its length is 25 cm-26 cm, its width 11 cm. Each year more than 100 million pulp kidney dishes are used in hospital or family care.