Digestive system

The digestive system (also known as alimentary system) is a complex system of organs providing mechanical and chemical processing of foot, absorption of nutrients, and excretion of the undigested remains. The digestive system consists of the gastrointestinal tract and accessory organs involved in digestion.

The human gastrointestinal tract is about eight to ten metres long, and it includes the following parts:

  • oral cavity,
  • pharynx,
  • esophagus,
  • stomach,
  • small intestine, with the following parts:
    • duodenum,
    • jejunum,
    • ileum;
  • large intestine, with the following parts:
    • caecum,
    • ascending colon,
    • transverse colon,
    • descending colon,
    • sigmoid colon,
    • rectum.

In addition, the digestive system includes salivary glands two major glandular organs - liver, pancreas, as well as the gallbladder and the peritoneum.