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Digestive System Organs

The digestive system is a collection of many organs, each with a specific purpose, working in unison.

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Digestive System Organs
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Vocabulary

absorption

Process in which substances such as nutrients pass into the blood stream.

accessory organ

Organ that secretes or stores substances needed for digestion.

chemical digestion

Chemical breakdown of large, complex food molecules into smaller, simpler nutrient molecules that can be absorbed by the blood.

digestion

Process of breaking down food into nutrients that can be absorbed by the blood.

digestive system

Organ system that breaks down food, absorbs nutrients, and eliminates any remaining waste.

elimination

Process in which waste passes out of the body.

gastrointestinal tract

The part of the anatomy involved with the process of digestion; refers to the stomach and intestine; may refer to all the structures from the mouth to the anus.

mechanical digestion

Physical breakdown of chunks of food into smaller pieces by organs of the digestive system.

peristalsis

Rapid, involuntary, wave-like contraction of muscles that pushes food through the GI tract and urine through the ureters.

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