Question

the model below shows parts of the digestive system. choose the correct description for each box to show the primary digestive function of each structure. box 4 is given. 5. choose the correct description for box 1 in the digestive system model above. a) mechanical mixing and chemical breakdown by enzymes and acid b) absorption of water from undigested materials c) mechanical and chemical digestion d) none of the above 6. choose the correct description for box 2 in the digestive system model above. a) absorption of water from undigested materials b) mechanical mixing and chemical breakdown by enzymes and acid c) mechanical and chemical digestion d) none of the above 7. choose the correct description for box 3 in the digestive system model above. a) mechanical and chemical digestion b) absorption of water from undigested materials c) mechanical mixing and chemical breakdown by enzymes and acid d) none of the above

Explanation:

• Question 5: Box 1 is the mouth. In the mouth, mechanical digestion (chewing) and chemical digestion (salivary amylase starts starch digestion) occur.
• Question 6: Box 2 is the esophagus. The esophagus mainly transports food (peristalsis) and has no significant digestive or absorption functions as described in options A - C.
• Question 7: Box 3 is the large intestine. The large intestine's primary function (among the given options) is the absorption of water from undigested materials.

Answer:

1. C. Mechanical and chemical digestion
2. D. None of the above
3. B. Absorption of water from undigested materials