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Blood flows from the pulmonary veins into the

• pulmonary arteries

• right atrium

• lungs

• left atrium

• left ventricle

The space between the parietal and visceral layers of the pericardium is normally filled with

• air

• blood

• adipose tissue

• serous fluid

The bicuspid valves located between the

• right ventricle and aorta

• right ventricle and pulmonary trunk

• left atrium and the left ventricle

• right atrium and left atrium

• right ventricle and left ventricle

There is a semilunar valve between the

• right ventricle and the aorta

• right ventricle and the pulmonary trunk

• left atrium and left ventricle

• right atrium and right ventricle

Blood flows from the superior vena cava into the

• right atrium

• inferior vena cava

• left atrium

• aorta

• pulmonary trunk

The layer of the heart wall responsible for its pumping action is the

• fibrous pericardium

• serous pericardium

• epicardium

• myocardium

Which of the following lists the elements of the hearts conduction system in the correct order?

• SA node, AV bundle, bundle branches, AV node, conduction myofibers

• AV node, SA node, AV bundle, bundle branches, conduction myofibers

• SA node, AV node, AV bundle, bundle branches, conduction myofibers

• SA node, AV bundle, AV node, bundle branches, conduction myofibers

The fossa ovalis is a prominent depression seen in the

• wall of the aorta

• interventricular septum

• coronary sinus

• semilunar valves

• interatrial septum

During the normal cardiac cycle, the atria contract when they are directly stimulated by the:

• SA node

• AV node

• conduction myofibers

• baroreceptors

The atrioventricular valves close when the

• SA node fires

• atria contract

• ventricles relax

• ventricles contract