Circulatory System Quiz

What is the primary function of the circulatory system?

• Digestion

• Respiration

• Transportation of blood and nutrients

• Excretion

Which organ serves as the central pump in the circulatory system?

• Lungs

• Liver

• Heart

• Brain

Which type of blood vessel carries oxygenated blood away from the heart?

• Veins

• Capillaries

• Arteries

• Lymphatic vessels

What is the function of red blood cells (RBCs)?

• Fight infection

• Transport oxygen

• Clot blood

• Digest food

Which blood vessels are involved in the exchange of gases and nutrients between blood and tissues?

• Arteries

• Veins

• Capillaries

• Lymph nodes

What makes the blood RED?

• Plasma

• Platelets

• Hemoglobin

• Lymph

What is the largest artery in the body?

• Vena cava

• Aorta

• Pulmonary artery

• Coronary artery

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

• Tricuspid valve

• Mitral valve

• Aortic valve

• Pulmonary valve

What is the main function of white blood cells (WBCs)?

• Carry oxygen

• Fight infection

• Regulate blood pressure

• Remove waste products

Which vessels return deoxygenated blood to the heart?

• Arteries

• Veins

• Capillaries

• Arterioles