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6. Describe mechanical digestion. Where does it occur? What structures are respo

ID: 3515727 • Letter: 6

Question

6. Describe mechanical digestion. Where does it occur? What structures are responsible for mechanical digestion? 7. Describe chemical digestion. What is responsible for chemical digestion? 8. Fill in the following table with a summary description of the major function(s) of each organ Organ Function Mouth esophagus stomach small intestine large intestine (colon) Rectumm 9. Where does chemical digestion begin? Where in the digestive tract does the majority of chemical digestion take place? 10. Where does absorption begin? Where in the digestive tract does the majority of absorption take place? 11. What is the primary function of the large intestine? Why is this important? - 124-

Explanation / Answer

6.mechanical digestion is physical breakdown of the food. It mainly happens in buccal cavity with help of teeth.

7. Chemical digestion is breaking of complex nutrients to simpler forms through breakage of bonds. This is assisted by enzymes of the digestive system.

8.mouth: ingestion of food.

Oesophagus: passes food from buccal cavity to stomach.

Stomach: helps in physical and chemical breakdown of food.

Small intestine: digestion and absorption of nutrients to blood.

Large intestine: absorption of water.

Rectum: storage of undigested food.

9. It begins in buccal cavity. Majority of it takes place in small intestine.

10.absorption begins in small intestine and majority happens there only.

11. Large intestine absorbs mainly water from left over material in digestive system. It's important to conserve water in body and well as to accommodate fecal matter in less space in rectum.

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