7th December 2019

wikipedia
16

How large are arteries?

The larger arteries (>10 mm diameter) are generally elastic and the smaller ones (0.1–10 mm) tend to be muscular. Systemic arteries deliver blood to the arterioles, and then to the capillaries, where nutrients and gases are exchanged.

Which is more elastic arteries or veins?

Just as arterioles are smaller branches of arteries, so venules are smaller branches of veins. Venules receive blood from the capillaries and branch into veins that return blood to the heart. They do not have the need for the strength and elasticity of the arteries, so the walls of the veins are thin and almost floppy.

Are veins or capillaries bigger?

Capillaries then join up to form larger tubes called venules, and venules join up to form veins. Veins carry blood back to the heart. They have thinner walls than arteries because the blood is at a lower pressure.
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