Understanding the Heart and Circulatory System

What is the primary function of the heart?

• To store blood

• To pump blood throughout the body

• To filter blood

• To produce blood cells

Which side of the heart is responsible for pumping blood to the lungs?

• Neither side

• Left side

• Right side

• Both sides

What is the role of the atrioventricular valves?

• To prevent blood from flowing back into the atria

• To store deoxygenated blood

• To oxygenate the blood

• To pump blood to the lungs

Which blood vessel carries oxygenated blood from the heart to the body?

• Pulmonary artery

• Vena cava

• Aorta

• Pulmonary vein

What is the sequence of blood flow starting from the right atrium?

• Right atrium, right ventricle, pulmonary artery, lungs

• Right atrium, left ventricle, aorta, body

• Right atrium, left atrium, pulmonary vein, lungs

• Right atrium, aorta, body, lungs

What happens to blood in the lungs during the cardiac cycle?

• It loses oxygen and gains carbon dioxide

• It is filtered and stored

• It gains oxygen and loses carbon dioxide

• It remains unchanged

What is the largest artery in the body?

• Pulmonary artery

• Vena cava

• Coronary artery

• Aorta

What is the term for a single contraction and relaxation of the heart?

• Pulse

• Heartbeat

• Cardiac cycle

• Blood flow

Which chamber of the heart receives deoxygenated blood from the body?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

What is the main purpose of the semilunar valves?

• To store oxygenated blood

• To oxygenate the blood

• To pump blood to the atria

• To prevent blood from flowing back into the ventricles