Circulatory System Quiz

What is the primary function of the heart in the circulatory system?

• To filter blood

• To pump blood throughout the body

• To produce blood cells

• To store oxygen

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

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the main component of red blood cells that carries oxygen?

• Plasma

• Haemoglobin

• Platelets

• White blood cells

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

• Veins

• Arteries

• Capillaries

• Venules

Which blood vessel has the thinnest walls?

• Arteries

• Veins

• Capillaries

• Aorta

What is the function of platelets in the blood?

• To carry oxygen

• To fight infections

• To clot blood

• To transport nutrients

Which chamber of the heart pumps deoxygenated blood to the lungs?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the main function of capillaries in the circulatory system?

• To carry blood away from the heart

• To return blood to the heart

• To exchange oxygen, nutrients, and waste products with tissues

• To store blood

Which blood vessel carries oxygenated blood from the heart to the rest of the body?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Vena cava

How many chambers are there in the human heart?

• 2

• 3

• 4

• 5