The Circulatory System - SME

What is the primary function of the right side of the heart?

• To receive oxygenated blood from the lungs

• To receive oxygenated blood from the body

• To pump blood to the lungs

• To pump blood to the body

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

• Aorta

• Vena cava

• Pulmonary vein

• Pulmonary artery

What is the role of the valves in the heart?

• To separate the atria and ventricles

• To oxygenate blood

• To prevent backflow of blood

• To pump blood

What is the function of the septum in the heart?

• To pump blood to the lungs

• To prevent mixing of deoxygenated and oxygenated blood

• To regulate heart rate

• To supply the heart with oxygenated blood

What is the natural pacemaker of the heart?

• The right ventricle

• A group of cells in the right atrium

• The coronary arteries

• The left atrium

What happens when the ventricles contract?

• Blood flows down through the valves

• Blood travels up through the aorta and pulmonary artery

• Blood flows into the atria

• Blood is oxygenated

Why is the wall of the left ventricle thicker than that of the right ventricle?

• It receives deoxygenated blood

• It pumps blood at lower pressure

• It pumps blood to the lungs

• It pumps blood at high pressure around the entire body

What is the function of the coronary arteries?

• To prevent backflow of blood

• To regulate the heart rate

• To supply the heart tissue with oxygenated blood

• To pump blood to the lungs

What is the role of the pacemaker in the heart?

• To supply the heart with oxygenated blood

• To pump blood to the body

• To prevent backflow of blood

• To coordinate the contraction of the heart muscle

What is the purpose of an artificial pacemaker?

• To prevent mixing of deoxygenated and oxygenated blood

• To correct irregularities in the heart rate

• To pump blood to the lungs

• To supply the heart with oxygenated blood