6. Contraction of the ventricles causes a period of high pressure in the blood vessels called
pressure. Relaxation of the ventricles causes a period of low pressure called the_b_
pressure. The average_a_ pressure is about _c_ mmHg while _b__ is about_d_
mmHg._e_ is given as the _a___ pressure over the __b_pressure.
d.
a.
b.
C.
e.
a