Blood capillary network of villi absorb

Options

A. Water
B. Salts
C. Glucose
D. All of these

Answer

### Step-by-Step Text Solution:

1. **Understanding Villi**: Villi are small, finger-like projections located in the small intestine. They play a crucial role in increasing the surface area available for absorption.

2. **Function of the Small Intestine**: The primary function of the small intestine is to absorb nutrients and water from the digested food. The increased surface area provided by villi enhances this absorption process.

3. **Structure of Villi**: Each villus contains a network of blood capillaries and a lymphatic vessel known as a lacteal. The blood capillaries are responsible for absorbing nutrients directly into the bloodstream.

4. **Absorption of Nutrients**: The blood capillary network in the villi absorbs various substances:
- **Water**: A significant amount of water is absorbed in the small intestine.
- **Salts**: Electrolytes such as sodium and potassium are absorbed through the epithelial cells.
- **Glucose**: Glucose is absorbed via a specific transport mechanism called the Sodium-Glucose Symporter, which utilizes sodium ions to facilitate glucose uptake.

5. **Conclusion**: The blood capillary network of the villi is responsible for absorbing water, salts, and glucose from the digested food, which are essential for the body's metabolic processes.