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Science Chapter 19 notes
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13
Science
7th Grade
10/17/2011

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Term
What is digestion?
Definition
breaks food down into small molecules that can be absorbed by blood
Term
What is it called when food is chewed, mixed, and churned?
Definition
mechanical digestion
Term
What is chemical digestion?
Definition
chemical reactions break down food
Term
What are the type of protein that speeds up the rate of a chemical reaction in your body?
Definition
enzymes
Term
Many enzymes are involved in the digstion of what 3 things?
Definition
carbonhydrates, proteins, and fats
Term
What are Accessory organs?
Definition
organs that food does not pass threw them
Term
What 3 things change food into a soft mass?
Definition
tongue, teeth, and saliva
Term
here your tongue, teeth, and saliva change food into a soft mass
Definition
mouth
Term
Muscular tube moves food to the stomach using peritahs, or waves of musclar contractions
Definition
esophagus
Term
Where does this happen: here food is digested mechanically by perisalsis and chemically by digestive so lutions whith the help of enzymes. Food becomes a water liquid called chyme.
Definition
stomach
Term
What happens in the small intestine?
Definition
villi increases the surface area to increase abosorbed nutrients to cells
Term
What happens in the large intestine?
Definition
absorbs water from undigested chyme, peristalsis slows down so chyme can be in the large intestines as long as 3 days. The rectum and anus control the releas of solid wastes from the body.
Term
What does bacteria make in many organs of your body?
Definition
vitamins your body needs
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