How does protein provide nutrition?

Explanation

### Step-by-Step Solution

1. **Definition of Proteins**: Proteins are essential macromolecules that serve as the building blocks of our body. They play a crucial role in various biological functions.

2. **Digestion of Proteins**: When we consume proteins through our diet, they undergo a process called digestion. During digestion, proteins are broken down into smaller units known as amino acids.

3. **Absorption of Amino Acids**: Once proteins are digested into amino acids, these amino acids are absorbed into the bloodstream through the walls of the intestine.

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