Understanding the Human Heart

What is the primary function of the heart?

• To digest food

• To pump blood throughout the body

• To filter waste from the blood

• To produce hormones

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

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the role of the sinoatrial (SA) node in the heart?

• To delay the impulse between atria and ventricles

• To generate electrical impulses, initiating each heartbeat

• To transmit the impulse to the ventricles

• To spread the impulse throughout the ventricles

Through which valve does blood pass from the right atrium to the right ventricle?

• Mitral valve

• Aortic valve

• Tricuspid valve

• Pulmonary valve

What is the function of the atrioventricular (AV) node?

• To generate electrical impulses

• To delay the impulse, allowing the ventricles to fill with blood

• To spread the impulse throughout the ventricles

• To carry blood to the lungs

Which blood vessel carries deoxygenated blood from the right ventricle to the lungs?

• Aorta

• Pulmonary artery

• Superior vena cava

• Pulmonary vein

Where does oxygenated blood return to the heart from the lungs?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

Which valve does blood pass through from the left atrium to the left ventricle?

• Tricuspid valve

• Pulmonary valve

• Bicuspid valve

• Aortic valve

What is the largest artery in the body that distributes oxygen-rich blood?

• Pulmonary artery

• Superior vena cava

• Aorta

• Inferior vena cava

What is the role of the Purkinje fibres in the heart?

• To generate electrical impulses

• To delay the impulse between atria and ventricles

• To spread the impulse throughout the ventricles

• To carry blood to the lungs