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Human body Topic 6

Across
Each day, cells with the walls of the GI tract and accessory digestive organs secrete about 7 liters of water, acid, buffers, and enzymes into the lumen (interior space) of the tract.
Mechanical and chemical processes break down ingested food into small molecules.
is a continuous tube that extends from the mouth to the anus, and are the organs through which food passes.
Down
This process involves taking foods and liquids into the mouth
Alternating contractions and relaxations of smooth muscle in the walls of the GI tract mix food and secretions and propel them toward the anus.
The elimination of feces from the rectum is called
extends from the ileocecal sphincter to the anus. Its regions include the cecum, colon, rectum, and anal canal.