Arteries have _ and _ walls when compared to veins

Options

A. Thicker, stronger
B. Thicker, weaker
C. Thinner, stronger
D. Thinner, weaker

Answer

To answer the question "Arteries have _ and _ walls when compared to veins," we need to analyze the characteristics of arteries and veins.

### Step-by-Step Solution:

1. **Understanding the Structure of Blood Vessels**:
- The human circulatory system consists of three main types of blood vessels: arteries, veins, and capillaries.
- Arteries carry blood away from the heart, while veins carry blood towards the heart.

2. **Comparing the Walls of Arteries and Veins**:
- **Thickness**: The walls of arteries are thicker than those of veins. This thickness is necessary to withstand the high pressure of blood being pumped from the heart.
- **Strength**: Arteries are also stronger than veins. The muscular and elastic nature of artery walls allows them to handle the pressure and maintain the flow of blood.

3. **Characteristics of Veins**:
- In contrast, veins have thinner walls compared to arteries. This is because the blood in veins is under lower pressure.
- The walls of veins are weaker than those of arteries, which is why they are more prone to collapse if not filled with blood.

4. **Conclusion**:
- Therefore, when comparing arteries to veins, we can conclude that arteries have **thicker** and **stronger** walls.

### Final Answer:
Arteries have **thicker** and **stronger** walls when compared to veins.

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