____supply/supplies oxygenated blood to heart musculature.

Options

A. Coronary arteries
B. Carotid artery
C. Hepatic artery
D. Coronary sinus

Answer

To answer the question, "____ supply/supplies oxygenated blood to heart musculature," we need to identify the specific arteries responsible for delivering oxygenated blood to the heart muscle.

### Step-by-Step Solution:

1. **Understanding the Heart's Function**: The heart is a vital organ responsible for pumping blood throughout the body. It requires a continuous supply of oxygenated blood to function effectively.

2. **Circulatory System Overview**: The circulatory system consists of two main circuits: pulmonary circulation (between the heart and lungs) and systemic circulation (between the heart and the rest of the body).

3. **Identifying the Blood Supply to the Heart**: The heart itself needs oxygenated blood, which is supplied by specific arteries.

4. **Coronary Arteries**: The arteries that supply oxygenated blood to the heart muscle are known as coronary arteries. There are two main coronary arteries:
- **Left Coronary Artery**: Supplies blood to the left side of the heart.
- **Right Coronary Artery**: Supplies blood to the right side of the heart.

5. **Conclusion**: Therefore, the correct answer to the question is "coronary arteries," as they are responsible for supplying oxygenated blood to the heart musculature.

### Final Answer:
**Coronary arteries supply oxygenated blood to heart musculature.**

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