Transcript Digestion Review

Digestion Review
•MOUTH
•Mechanical and Chemical Digestion begin in the mouth
•Saliva is produced by the salivary glands and contains enzymes
which help to speed up the process of digestion. This is the
Chemical Part of digestion in the mouth.
•The teeth and tongue help to break up the food you eat – this is the
mechanical part of digestion in the mouth.
•ESOPHAGUS
•coated in mucus
•Connects the mouth to the stomach
•A wave like motion called peristalsis moves food down this organ.
•STOMACH
•J-shaped organ
•Coated in mucus so the hydrochloric acid that helps the enzyme
pepsin will not burn the lining (ulcers)
•Muscles here mechanically break down food while enzymes
chemically break it down.
•SMALL INTESTINES
•MOST CHEMICAL DIGESTION TAKES PLACE HERE!
•The pancreas sends juices here and the liver sends the bile (which
is stored in the gall bladder)
•The Small intestine even makes its own juices full of enzymes
•Villi at the end of the S.I. absorb food into the bloodstream so it can
be taken to all parts of the body
•LARGE INTESTINES
•Undigested food moves here to prepare to exit the body
•Water is absorbed here
•Vit K is produced here
•Last part called rectum
•End of Rectum – Anus
Digestion Review –
Cont’d
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6 essential nutrients for human health
– Proteins
– Fats
– Water – most important - need 2 liters per day
– Vitamins – need in small amounts
– /Minerals – need in small amounts
– Carbohydrates
FOOD GUIDE PYRAMID
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Indicates how many servings from each food group should be eaten each
day
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Classifies food into 6 groups and helps a person know the # of servings
from each group to eat each day
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STUDY ALL NOTES
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STUDY YOUR DIAGRAM OF THE ORGANS IN THE SYSTEM
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GO TO MY WEB PAGE AND GO THROUGH THE WEBQUEST WE DID IN CLASS LAST
WEEK – USE THE ONLINE QUIZZES TO HELP YOU PREPARE FOR THE DIAGRAM ON THE
QUIZ!