Circulatory System Quiz

What are the two main functions of the circulatory system?

• Transport of blood components and protection against disease

• Digestion and absorption of nutrients

• Regulation of body temperature and hormone production

• Excretion of waste and water balance

What is the primary function of red blood cells?

• To carry oxygen around the body

• To produce antibodies

• To form blood clots

• To transport hormones

Which component of blood is responsible for blood clotting?

• Platelets

• Plasma

• Red blood cells

• White blood cells

What is the role of plasma in the blood?

• Transport of blood cells and absorbed food molecules

• Carrying oxygen to body organs

• Producing antibodies

• Engulfing microorganisms

How do arteries differ from veins in terms of blood pressure?

• Arteries carry blood at high pressure; veins carry blood at low pressure

• Arteries carry blood at low pressure; veins carry blood at high pressure

• Both carry blood at the same pressure

• Arteries and veins do not carry blood

What is the function of valves in veins?

• To increase blood pressure

• To prevent backflow and keep the flow unidirectional

• To reduce blood volume

• To increase blood temperature

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

• Aorta

• Vena cava

• Pulmonary vein

• Renal artery

What is the role of the hepatic portal vein?

• Carries oxygen and glucose to the liver

• Carries digested food from the small intestine to the liver

• Carries deoxygenated blood from the body back to the heart

• Carries blood rich in urea to the kidneys

Why are the walls of the ventricles thicker than the walls of the atria?

• To store more blood

• To pump blood further than the atria

• To reduce blood pressure

• To increase heart rate

What is the benefit of regular exercise on the circulatory system?

• Increases blood sugar levels

• Strengthens the heart muscle

• Decreases oxygen levels

• Weakens blood vessels