Exam 20: The Heart

Figure 20-1 The Heart Use Figure 20-1 to answer the following questions: -Identify the structure labeled "19."

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at "A" on the graph?

The atrioventricular valves permit blood flow

Stroke volume depends on

The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the

Excess fluid in the ________ causes cardiac tamponade.

The coronary sinus drains the ________ into the ________.

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the circled label "4" on the graph?

End-systolic volume is defined as the

If the force of ventricular contraction increases,what will happen to the end-systolic volume?

The inferior point of the heart is called the

The principle that increasing the end-diastolic volume results in a corresponding increase in the stroke volume is known as

Pericardial fluid

Each of the following factors will increase cardiac output except increased

The earlike extension of the atrium is the

The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.

The heart lies within the ________ cavity.

The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the

The heart beats approximately ________ times each day.

The T wave on an ECG tracing represents