Why Do Veins Have Relatively Thin Walls

question 107

Multiple Choice

Why do veins have relatively thin walls?

• A) It allows a typical vein to change the diameter of its lumen.
• B) It allows a typical vein to be stretched as its diameter increases during ventricular systole.
• C) A typical vein's wall allows exchange to occur quickly by diffusion across endothelial cells or through gaps between adjacent endothelial cells.
• D) A typical vein does not need to withstand much pressure.
• E) There are sphincters associated with the walls of veins, which allow vasomotion to occur.

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