Heart Function and Circulation Worksheet

What is the primary function of the pericardium?

• To pump blood

• To protect the heart

• To generate electrical impulses

• To filter blood

Which layer of the heart wall contains cardiac muscle tissue?

• Endocardium

• Myocardium

• Pericardium

• Epicardium

What kind of circulation does the right side of the heart support?

• Systemic circulation

• Coronary circulation

• Pulmonary circulation

• Peripheral circulation

Which chamber of the heart pumps blood into the systemic circulation?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the function of the tricuspid valve?

• To prevent backflow into the left atrium

• To prevent backflow into the right atrium

• To prevent backflow into the left ventricle

• To prevent backflow into the pulmonary artery

During diastole, what is the state of the myocardium?

• Contracting

• Relaxed

• In recovery

• Both B and C

What percentage of blood enters the ventricles via passive filling during diastole?

• 30%

• 50%

• 70%

Which phase of the cardiac cycle involves the contraction of the atria?

• Diastole

• Atrial systole

• Ventricular systole

• Recovery phase

What mineral is essential for heart muscle contraction?

• Sodium

• Potassium

• Calcium

• Magnesium

Where does the cardiac conduction signal originate?

• AV node

• Purkinje fibres

• Bundle of His

• SA node