Distinguish arteries from veins.

Explanation

### Step-by-Step Solution to Distinguish Arteries from Veins

1. **Definition and Function**:
- **Arteries**: These are blood vessels that carry blood away from the heart to various parts of the body. They transport oxygenated blood (except for the pulmonary artery, which carries deoxygenated blood to the lungs).
- **Veins**: These are blood vessels that carry blood back to the heart from the body. They transport deoxygenated blood (except for the pulmonary vein, which carries oxygenated blood from the lungs to the heart).

**Hint**: Remember that arteries "exit" the heart, while veins "return" to the heart.

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