digestive system

the system by which ingested food is acted upon by physical and chemical means to provide the body with absorbable nutrients and to excrete waste products; in mammals the system includes the alimentary canal extending from the mouth to the anus, and the hormones and enzymes assisting in digestion.


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American Heritage
Medical Dictionary

digestive system n.
The alimentary canal and digestive glands regarded as an integrated system responsible for the ingestion, digestion, and absorption of foodstuffs and the elimination of associated wastes. Also called alimentary system.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
digestive system   (dī-jěs'tĭv)  Pronunciation Key 

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The alimentary canal together with the salivary glands, liver, pancreas, and other organs of digestion.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

digestive system definition

The organs and glands in the body that are responsible for digestion. The digestive system begins with the mouth and extends through the esophagus, stomach, small intestine, and large intestine, ending with the rectum and anus. Other organs in this system include the liver, pancreas, gallbladder, and appendix.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Although good for the plants, it is not so good for the human digestive system.
Faeces are food that has been processed by the human digestive system to
  extract as much useful energy as possible.
Natural healthy bacteria in the digestive system appears to provide beneficial
  skin health as well.
We live in a world of grey, even in the matter of our bodies digestive system.
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