Identify which features of the small intestine make it well suited to the absorption of nutrients.

The small intestine is well suited to the absorption of nutrients due to several key features:

1. Length: The small intestine is about 20 feet long in adults. This length provides a large surface area for absorption of nutrients.

2. Villi and Microvilli: The inner surface of the small intestine is covered in tiny finger-like projections called villi. Each villus is covered in even smaller projections called microvilli. These structures increase the surface area of the small intestine even further, allowing for more efficient absorption of nutrients.

3. Permeability: The cells of the small intestine are very permeable, meaning they allow nutrients to pass through them easily. This is essential for the absorption process.

4. Blood Supply: The small intestine has a rich blood supply. Once nutrients are absorbed, they are quickly transported away by the blood to be used by the body.

5. Digestive Enzymes: The small intestine produces and releases enzymes that help break down food into its nutrient components. This makes the nutrients easier to absorb.

6. Active Transport: The cells of the small intestine use active transport to move nutrients from the inside of the intestine into the bloodstream. This means they can absorb nutrients even against a concentration gradient.

7. Mucus Production: The small intestine produces mucus, which protects the intestinal lining and helps move food along.

These features all work together to make the small intestine an efficient organ for nutrient absorption.