Cardiovascular System Study Guide

What is the inner layer of the heart called?

• Endocardium

• Myocardium

• Pericardium

• Epicardium

Which layer of the heart is the muscular middle?

• Myocardium

• Endocardium

• Epicardium

• Pericardium

What is the outer layer of the heart called?

• Epicardium

• Myocardium

• Endocardium

• Pericardium

Which heart chamber receives deoxygenated blood?

• Right atrium (RA)

• Left atrium (LA)

• Left ventricle (LV)

• Right ventricle (RV)

Which heart chamber pumps blood to the lungs?

• Right ventricle (RV)

• Left ventricle (LV)

• Right atrium (RA)

• Left atrium (LA)

Which heart chamber receives oxygenated blood?

• Left atrium (LA)

• Right atrium (RA)

• Right ventricle (RV)

• Left ventricle (LV)

Which heart chamber pumps blood to the body?

• Left ventricle (LV)

• Right ventricle (RV)

• Left atrium (LA)

• Right atrium (RA)

Match the following heart valves to their locations:

• Left semilunar valve

• Pulmonic

• Right semilunar valve

• Mitral

• Left AV valve

• Tricuspid

• Right AV valve

• Aortic

What is the function of the SA Node in the cardiac conduction system?

• Acts as the pacemaker of the heart, 60–100 bpm

• Initiates ventricular contraction directly

• Regulates blood pressure in the aorta

• Controls the closing of heart valves

What is the function of the AV Node in the cardiac conduction system?

• Delays impulse, 40–60 bpm

• Initiates heartbeat, 60–100 bpm

• Contracts ventricles, 20–40 bpm

• Regulates blood pressure