11) The average heart beats approximately 75 times each minute : 1221264.
11) The average heart beats approximately 75 times each minute at rest.
12) During ventricular diastole, the bicuspid and tricuspid valves are closed.
13) Cardiac output is calculated by multiplying the stroke volume by the systolic blood pressure.
14) Reductions in venous return cause reductions in both stroke volume and cardiac output.
15) An increased firing of the parasympathetic nervous system causes increased cardiac output.
16) Smooth muscle and elastic tissue in a blood vessel wall is found primarily in the tunica media.
17) Capillaries are composed only of tunica intima.
18) Exchanges between blood and tissue cells occur in capillary beds.
19) When precapillary sphincters are closed, blood flows through the shunts and bypasses the tissue cells.
20) The portion of the aorta in the abdominopelvic cavity is known as the thoracic aorta.
11) The average heart beats approximately 75 times each minute : 1221264
