Circulatory System Quiz

What is the main organ of the circulatory system?

• heart

• brain

• kidney

• liver

Which blood vessels carry oxygenated blood away from the heart?

• arteries

• lymphatic vessels

• capillaries

• veins

What is the function of capillaries in the circulatory system?

• Capillaries transport oxygen to the lungs.

• Capillaries help filter waste products from the blood.

• Capillaries regulate blood pressure in the circulatory system.

• Capillaries facilitate the exchange of substances between the blood and tissues.

What is the average heart rate for a healthy adult at rest?

• 40-60 beats per minute

• 80-120 beats per minute

• 100-140 beats per minute

• 60-100 beats per minute

Which chamber of the heart pumps oxygenated blood to the body?

• left ventricle

• right atrium

• left atrium

• right ventricle