the-structure-of-capillary-walls-differs-from-veins-and-arteries-in-that-they-la

Question

The structure of capillary walls differs from veins and arteries in that they lack a tunica externa layer. Which of the following is the primary function of tunica externa?

Accepted Answer

Provides support and protection

Answer

Ensures smooth flow of blood

Answer

Produces red blood cells

Answer

Responsible for blood clotting