Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: What occurs at the area labeled “B” on the graph?

The ________ covers the outer surface of the heart.

Vickie has a tumor that secretes excess amounts of the hormone aldosterone. Because of the elevated level of hormone, she exhibits

The amount of blood returning to the heart is the

A faster-than-normal heart rate is called

Blood flowing into the heart from the venae cavae flows next through the ________ valve.

Which of these events is NOT associated with ventricular systole:

________ form elaborate capillary networks within tissues that allow for very slow blood flow.

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: What occurs at the circled label “5” on the graph?

The muscular layer in the wall of a blood vessel is the tunica