What is the advantage of having four chambered heart?

Explanation

### Step-by-Step Solution:

1. **Understanding the Structure of a Four-Chambered Heart**:
- A four-chambered heart consists of two atria (upper chambers) and two ventricles (lower chambers). The right atrium and right ventricle handle deoxygenated blood, while the left atrium and left ventricle manage oxygenated blood.

2. **Complete Segregation of Blood**:
- The primary advantage of having a four-chambered heart is the complete separation of oxygenated and deoxygenated blood. This prevents the mixing of the two types of blood, which is crucial for maintaining efficient oxygen transport in the body.

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