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Arteries and arterioles have walls that are, compared with veins and venules:
AThinner
BIdentical
CAbsent
DThicker
Answer & Solution
Correct answer: D. Thicker
1. Wall thickness follows the pressure a vessel must withstand.
2. Vessels differ in how much pressure they face.
3. Arteries and arterioles have thicker walls than veins and venules.
4. That is because they are closer to the heart.
_Source: OpenStax Anatomy and Physiology 2e (CC BY 4.0), Ch 20 'The Cardiovascular System: Blood Vessels and Circulation', sections 20.1-20.5_
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