19. The Blood Vessels

The vein that collects most of the venous blood inferior to the diaphragm is the 

(a) Superior vena cava

(b) Great saphenous vein

(c) Inferior vena cava

(d) Azygos vein

A major difference between the arterial and venous systems is that 

(a) Arteries are usually more superficial than veins.

(b) In the limbs there is dual venous drainage.

(c) Veins are usually less branched compared to arteries.

(d) Veins exhibit a much more orderly pattern of branching in the limbs.

(e) Veins are not found in the abdominal cavity.

Which of the following can lead to decreased venous return of blood to the heart?

a. An increase in blood volume

b. An increase in venous pressure

c. Damage to the venous valves

d. Increased muscular activity