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Digestive System
Digestive System Quiz
20
Biology
9th Grade
12/06/2006

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Term
Chyme
Definition
Liquified food in the stomach after 3 to 4 hours
Term
Epiglottis
Definition
Flap of skin that covers the Trachea when swallowing
Term
esophagus
Definition
a tube , no digestion occurs, here 12 feet long, peristalsis helps move foodfood into the stomach
Term
trachea
Definition
a second tube that leads to the lungs
Term
stomach
Definition
is a j-shaped muscular organ to the left of the liver, churrning of the food with gastric jucies helps in mechanical digestion, food stays for about 3-4 hours in that time it becomes chyme
Term
peristalsis
Definition
muscular contraction of the esophugus which allows you to stand on your head and still be able to swallow
Term
gastric juices or hydrochloric acid
Definition
helps kill germs and bactaria
Term
small intestine
Definition
20 feet long by 1 inch wide, the remaining carbohydrates and protiens are broken down, it also absorbes nutrients, this happeneds because it is lined with villi
Term
villi
Definition
hairlike projections inthe small intestine which absorb nutrients
Term
protease->
lipase->
carbohydrates->
Definition
amino acids
fatty acids and glycerol
monosaccrides
Term
large intestine
Definition
6 foot by 2 inchesin diameter,store and compact the undigestible material, absorbes water
Term
pharynx
Definition
throat
Term
pepsin
Definition
enzyme that begins the digestion of protiens
Term
hydrocloric acid
Definition
helps kill germs and bactaria
Term
rectum
Definition
where remaining solid wastes are stored temporarialy
Term
gall bladder
Definition
stores bile
Term
liver
Definition
produces bile
Term
pancreas
Definition
it completes digestion
Term
mechanical digestion
Definition
process by which large food molecules are broken down into smaller food molecules
Term
mechanical digestion
Definition
process by which large pieces of food are cut and crushed in to samller pieces
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