The following are true about micro-circulation:
a. arterioles have no muscle
b. capillaries have walls made up of a single layer of cells
c. capillaries have no innervation
d. the capillaries contain 5% of the total blood volume at any one time
a. arterioles have no muscle
b. capillaries have walls made up of a single layer of cells
c. capillaries have no innervation
d. the capillaries contain 5% of the total blood volume at any one time