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25 POINTS!!!!!!!
How do capillaries differ in structure from arteries and veins?

A. Capillaries have smoother muscle tissue than veins.
B. Capillaries appear to have a larger diameter than veins
C. Capillaries have valves which are absent in arteries.
D. Capillaries are only one cell thick and lack smooth muscle.

Relax

Respuesta :

champhorses
Capillaries are only one cell thick and lack smooth muscle. Capillaries are tiny and do not have valves. 

Answer:

The correct answer is D I promise :))

Explanation:

I took the test

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