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Digestion
7th Grade Science Digestive System
Question | Answer |
---|---|
4 Stages of Digestion | Ingestion, Digestion, Absorption, Elimination |
Digestion | Breaks food into small particles for absorption |
Mechanical Digestion | Teeth, tongue, stomach => chew,mix,churn |
Chemical Digestion | Enzymes break down food through chemical reactions |
Enzyme | Protein speeds up rate of chemical reaction |
Epiglottis | At the back of the tongue, covers the windpipe |
Esophagus | Connects the mouth to the stomach |
Peristalsis | Squeezing action of smooth muscles in esophagus, stomach, and small intestine |
Liver | This is where Bile is made. |
Pancreas | Adds enzymes to stomach |
Villi | Folds in small intestine that absorb nutrients finger like projection. they increase surface are for absorption , they have thin walls surrounded by blood capillaries. There are lots of them. |
Large Intestine | Absorbs water from undigested materials |
Bacteria | Help make vitamins K and B |
ingestion | process of taking food into the body |
Absorption | The process by which nutrient molecules pass through the wall of the digestive system into the blood. |
Peristalsis | Involuntary waves of muscle contraction that keep food moving along in one direction through the digestive system. |
Gallbladder | This stores bile and transfers it to the small intestine. |