The digestive system, which extends from the mouth to the anus, is responsible for receiving food, breaking it down into nutrients (a process called digestion), absorbing the nutrients into the bloodstream, and eliminating the indigestible parts of food from the body. The digestive tract consists of the
The digestive system also includes organs that lie outside the digestive tract:
The
digestive (or gastrointestinal) system, extending from the mouth to the anus, is responsible for receiving and digesting food and excreting waste. This system includes not only the stomach, small intestine, and large intestine, which move and absorb food, but associated organs such as the pancreas, liver, and gallbladder, which produce digestive enzymes, remove toxins, and store substances necessary for digestion.
It plays a part in the endocrine system.
The
endocrine system consists of various glands that produce chemical transmitters called hormones. Hormones travel to other organs through the bloodstream and regulate the function of those organs. For example, the
thyroid gland produces thyroid hormone, which controls the metabolic rate (the speed at which the body's chemical functions proceed). The
pancreas produces insulin, which controls the use of sugar.
Overview of the Digestive System - Explore from the Merck Manuals - Medical Consumer Version.
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