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Ch 3 Digestive System
Final Exam Flashcards
30
Science
6th Grade
06/11/2006

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Cards

Term
nutrient
Definition
usable portion of food
Term
Calorie
Definition
amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree
Term
protein
Definition
nutrient that is used to build and repair body parts; made of amino acids
Term
amino acid
Definition
building block of protein
Term
carbohydrate
Definition
energy-rich nutrient found in foods such as vegetables and grain products
Term
fat
Definition
nutrient that supplies the body with energy and also helps support and cushion the vital organs in the body
Term
vitamin
Definition
nutrient that helps regulate growth and normal body functioning
Term
mineral
Definition
nutrient that helps maintain the normal functioning of the body
Term
ptyalin
Definition
enzyme in saliva that breaks down some starches into sugars
Term
enzyme
Definition
chemical substance that helps control chemical reactions
Term
esophagus
Definition
tube that carries food to the stomach
Term
peristalsis
Definition
waves of muscular contractions that move food through the digestive system
Term
stomach
Definition
"J" shaped digestive organ that connects the esophagus to the small intestine
Term
pepsin
Definition
enzyme produced by the stomach that digests proteins
Term
small intestine
Definition
digestive organ in which most digestion takes place
Term
liver
Definition
organ that produces bile
Term
pancreas
Definition
organ that produces pancreatic juice and insulin
Term
villus
Definition
finger-like structure that lines the small intestine through which food is absorbed into the bloodstream
Term
large intestine
Definition
organ in the digestive system in which water is absorbed and undigested food is stored
Term
rectum
Definition
end of the large intestine
Term
anus
Definition
opening at the end of the rectum through which solid wastes are eliminated
Term
proteins, carbohydrates, fats, vitamins, minerals and water
Definition
Name the six groups of nutrients.

(Hint: Pete Can Flatten Very Muscular Worms)
Term
digestion
Definition
What is the process of breaking down food into simple substances called?
Term
chemical digestion
Definition
the changing of food into simple substances by the action of enzymes
Term
mechanical digestion
Definition
occurs when food is broken down by chewing and by the churning movements of the digestive tract
Term
gastric juice
Definition
contains hydochloric acid, mucus and the enzyme, pepsin
Term
bile
Definition
produced by the liver, stored in the gallbladder and aids in the digestion of fat
Term
pancreatic juice
Definition
travels to the small intestine and digests proteins, starches & fats
Term
the stomach
Definition
Where does the digestion of proteins begin?
Term
epiglottis
Definition
small flap of tissue that closes over the trachea (windpipe)
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