Some features of villi of the small intestine in humans are given below:
(i) They are finger-like with very thin walls
(ii) Provide a large surface area
(iii) Have small pores for food to pass.
(iv) Richly supplied by blood capillaries
Which option/options shows/show the features that enable the villi to absorb food?

Correct option is A

Sol: The correct answer is (a) (i), (ii) and (iv)

To determine which features of the villi enable them to absorb food effectively, let's evaluate each option:

(i) They are finger-like with very thin walls

• This feature allows for efficient diffusion of nutrients because the thin walls reduce the distance for absorption.

(ii) Provide a large surface area

• This is a critical feature for absorption. A large surface area increases the contact between the digested food and the villi, allowing more nutrients to be absorbed.

(iii) Have small pores for food to pass

• This statement is incorrect because food does not "pass through" pores in the villi. Instead, nutrients are absorbed through the thin walls into the blood capillaries.

(iv) Richly supplied by blood capillaries

• This is another important feature. The blood capillaries transport absorbed nutrients (e.g., glucose, amino acids) to the rest of the body.

The features that enable the villi to absorb food are:

• (i) Finger-like with very thin walls
• (ii) Provide a large surface area
• (iv) Richly supplied by blood capillaries

Information booster:

Small intestine:

• The small intestine is a long, coiled tube located between the stomach and the large intestine.
• It is about 6 to 7 meters long in adults, making it the longest part of the digestive system.
• The small intestine is responsible for the digestion and absorption of nutrients.
• It has finger-like projections called villi on its inner walls, which increase the surface area for absorption.