Action of the Heart

Which does not make up the circulatory system?

• heart
• blood
• lungs
• blood vessels

What chamber does blood first enter into the heart?

• Right Atrium
• Left Atrium
• Right Ventricle
• Left Ventricle

This layer encloses the heart

• myocardium
• pericardium
• endocardium
• epicardium

The space between the layers of the pericardium that contains fluid to reduce friction

• pericardial cavity
• epicardium
• endocardium
• myocardium

One complete heartbeat

• ECG
• systole
• diastole
• cardiac cycle

The name of the arteries that feed the heart muscle

• capillaries
• coronary
• chordae tendineae
• coronary sinus

The inner layer in the wall of the heart

• endocardium
• myocardium
• epicardium
• septum

The fibrous chords that attach to the cusps of the valves

• Purkinje fibers
• chordae tendineae
• papillary muscles
• cusps

SA node is known by this name as it control the rate of the heartbeat

• AV node
• Purkinje fibers
• SV node
• pacemaker

A recording of electrical changes that occur during the cardiac cycle

• blood pressure reading
• EKG
• QRS wave
• t Wave