Answered: Name the major organs of the digestive…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Name the major organs of the digestive system. Digestion (di-jest′yun) is the mechanical and chemical breakdown of foods and the absorption of the resulting nutrients by cells. Mechanical digestion breaks large pieces of food into smaller ones without altering their chemical composition. Chemical digestion breaks down larger nutrient molecules into simpler chemicals. The organs of the digestive system carry out these processes. The digestive system consists of the alimentary canal (al″i-men′tar-e kah-nal′), extending from the mouth to the anus, and several accessory organs that secrete into the canal substances that are used in digestion. The alimentary canal (from beginning to end) includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anus. The accessory organs include the salivary glands, liver, gallbladder, and pancreas (fig. 15.1; see reference plates 4, 5, and 6). Overall, the digestive system is a tube, open at both ends, that has an inside surface area of 186 square meters. It supplies nutrients for body cells.

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Definition Definition Organ system that helps in the digestion of food by mechanical and biochemical processes. The digestive system breaks down food into simpler components that enable the body to then absorb or transport nutrients. The human digestive system includes the gastrointestinal tract or alimentary canal and the associate glands. The organs of the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. The associated glands include salivary glands, liver, gallbladder, and pancreas.

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