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digestive system
digestive system
14
Science
7th Grade
04/21/2006

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Term
digestion
Definition
process by which your body breaks down food into small nutrient molecules
Term
absorption
Definition
process by which nutrient molecules pass through the wall of your digestive system into your blood
Term
enzyme
Definition
protein that speeds up the chemical reactions in digestion
Term
esophagus
Definition
a muscular tube that connects the mouth to the stomach
Term
peristalsis
Definition
involuntary waves of muscle contractions that push the food down the esophagus to the stomach
Term
bile
Definition
substance produced in teh liver that breaks up fat particles into smaller ones
Term
gall bladder
Definition
organ that stores bile from the liver until the intestines have material in them
Term
anus
Definition
muscular opening at the end of teh rectum
Term
rectum
Definition
end of the large intestine where waste material is compressed into a solid form
Term
large intestine
Definition
portion of the digestive system where water is absorbed and waste material is prepared for excretion
Term
pancreas
Definition
triangular organ at the start of the small intestine that tells the liver when to produce bile
Term
liver
Definition
organ that produces bile that is sent to teh small intestine
Term
small intestine
Definition
organ where nutrients are absorbed into the blood stream to be carried to the cells in the body
Term
stomach
Definition
j-shaped organ that can hold about 2 liters of food
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