Understanding the Cardiovascular System

Which chamber of the heart receives oxygenated blood from the lungs?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the main function of the aorta?

• To carry deoxygenated blood to the lungs

• To carry oxygenated blood to the body

• To pump blood into the right atrium

• To supply blood to the heart muscle

Which valve prevents the backflow of blood from the left ventricle to the left atrium?

• Tricuspid valve

• Pulmonary valve

• Mitral valve

• Aortic valve

During which phase of the cardiac cycle does the heart muscle contract and pump blood out of the chambers?

• Diastole

• Systole

• Isovolumetric relaxation

• Isovolumetric contraction

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

• Right atrium → Right ventricle → Pulmonary artery → Lungs → Left atrium → Left ventricle → Aorta

• Right atrium → Left atrium → Right ventricle → Left ventricle → Aorta → Lungs

• Right atrium → Right ventricle → Aorta → Lungs → Left atrium → Left ventricle

• Right atrium → Left ventricle → Right ventricle → Left atrium → Aorta → Lungs

Which blood vessels carry oxygenated blood from the lungs to the heart?

• Pulmonary arteries

• Pulmonary veins

• Superior vena cava

• Inferior vena cava

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

• To pump blood into the ventricles

• To act as the heart's natural pacemaker

• To prevent backflow of blood

• To supply oxygen to the heart muscle

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

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the term for the volume of blood pumped by each ventricle in one minute?

• Stroke volume

• Cardiac output

• Heart rate

• End-diastolic volume

Which structure separates the left and right sides of the heart?

• Septum

• Aorta

• Pulmonary valve

• Mitral valve