The walls of veins tend to be thicker and more elastic than those of comparably sized arteries.

Name: The walls of veins tend to be thicker and more elastic than those of comparably sized arteries.
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The walls of arteries tend to be thicker and more elastic than those of comparably sized veins. This is because arteries carry oxygen-rich blood from the heart to the rest of the body at high pressure, while veins carry oxygen-poor blood back to the heart at lower pressure.

The Walls of Veins Tend to Be Thicker and More