changes food into substances that cells can use eliminates wastes the digestive tract is 30’...

Changes food into substances that cells can use

Eliminates wastes

The digestive tract is 30’ from start to finish

1. Teeth Chew and Breakdown food

3. TongueSense of tasteMoves food back

2. Salivary GlandsProduce salivaConvert starch to sugar

4. EsophagusMoves food to stomachPeristaltic Waves: muscle action that pushes the food down.7. Liver

Produces Bileto breakup andabsorb fats

5. StomachAdds gastric juices(pepsin + hydrochloric acid)Gall Bladder breakup/absorb fats

8. PancreasSecretions digestfats, proteins andcarbohydrates

6. Small IntestineCompletes digestionof food20’ longVilli-”fingers liningintestinal walls, absorb nutrientsinto the body

9. Colon

Large intestineRemoves water from wastes (10% offood eaten)

10. RectumControls eliminationof solid wastes

ADDITIONAL FACTSIt takes 48 hours for a meal to complete a trip through the digestive tract Chyme: partially broken down food-as it leaves the stomach for the small intestineThe average meal stays in the stomach 4 hours fats/proteins-spend longest time there carbohydrates/liquids-spend least time thereThe lining of the stomach protects the stomach from gastric juices