Circulatory System Quiz

Which organ pumps blood around the body?

• Lungs

• Heart

• Stomach

• Liver

What is the main function of the circulatory system?

• To help us breathe

• To help us digest food

• To transport oxygen and nutrients around the body

• To control our body temperature

Which blood vessels carry oxygenated blood from the heart to the body?

• Arteries

• Veins

• Capillaries

• Lymphatic vessels

What is the liquid part of blood called?

• Plasma

• Red blood cells

• White blood cells

• Platelets

Which blood vessels carry deoxygenated blood back to the heart?

• Arteries

• Veins

• Capillaries

• Lymphatic vessels

What is the name of the largest artery in the body?

• Pulmonary artery

• Aorta

• Coronary artery

• Carotid artery

Which of the following is NOT a component of blood?

• Plasma

• Red blood cells

• White blood cells

• Muscles

What is the purpose of valves in the veins?

Which of the following is NOT a function of blood?

• Transporting oxygen

• Fighting infections

• Regulating body temperature

• Producing hormones

What is the purpose of red blood cells?

• To carry oxygen around the body

• To fight infections

• To regulate body temperature

• To produce hormones