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Study the following statements about vil...

Study the following statements about villi.
1. They are finger like projections.
2. They have very thin walls.
3. They have small pores through which food can pass easily.
4. They have a network of thin and small blood vessels close to the surface.
The statements which enable the villi to absorb digested food are

A

3, 4 and 1

B

4, 1 and 2

C

1, 2 and 3

D

2, 3 and 4

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements about villi enable them to absorb digested food, let’s analyze each statement step by step: 1. **Statement 1: They are finger-like projections.** - Villi are indeed finger-like projections found in the inner lining of the small intestine. Their shape increases the surface area available for absorption, which is essential for effective nutrient uptake. 2. **Statement 2: They have very thin walls.** - The walls of the villi are very thin, which facilitates the easy passage of nutrients from the intestinal lumen into the bloodstream. This thinness is crucial for absorption, as it allows nutrients to diffuse through quickly. 3. **Statement 3: They have small pores through which food can pass easily.** - This statement is somewhat misleading. While villi do allow for the absorption of nutrients, they do not have small pores that allow food to pass through in a way that would imply large particles can pass easily. Instead, nutrients are absorbed at the cellular level, and the structure of the villi prevents larger food particles from passing through. 4. **Statement 4: They have a network of thin and small blood vessels close to the surface.** - This statement is true. Villi contain a rich network of capillaries (small blood vessels) that transport absorbed nutrients away from the intestine into the bloodstream. This proximity to blood vessels is essential for the efficient absorption and transport of nutrients. **Conclusion:** The statements that enable the villi to absorb digested food are: - Statement 1: They are finger-like projections. - Statement 2: They have very thin walls. - Statement 4: They have a network of thin and small blood vessels close to the surface. **Final Answer: Statements 1, 2, and 4 are correct.** ---
To determine which statements about villi enable them to absorb digested food, let’s analyze each statement step by step: 1. **Statement 1: They are finger-like projections.** - Villi are indeed finger-like projections found in the inner lining of the small intestine. Their shape increases the surface area available for absorption, which is essential for effective nutrient uptake. 2. **Statement 2: They have very thin walls.** - The walls of the villi are very thin, which facilitates the easy passage of nutrients from the intestinal lumen into the bloodstream. This thinness is crucial for absorption, as it allows nutrients to diffuse through quickly. ...
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