Grade 4 Circulatory System Quiz

What are the three main types of blood vessels in the circulatory system?

• Aorta, pulmonary artery, vena cava

• Heart, lungs, liver

• Red blood cells, white blood cells, platelets

• Arteries, veins, and capillaries

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

• To filter air

• To regulate body temperature

• To pump blood

• To digest food

What is the liquid part of the blood called?

• juice

• soda

• milk

• plasma

Which blood vessels carry blood away from the heart?

• Veins

• Capillaries

• Lymphatic vessels

• Arteries

What is the smallest type of blood vessel?

• Lymphatic vessel

• Capillary

• Artery

• Vein

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

• Carry oxygenated blood away from the heart

• Carry deoxygenated blood towards the heart

• Regulate blood pressure in the body

• Transport nutrients to the heart

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

• Carry deoxygenated blood back to the heart

• Regulate blood pressure

• Carry oxygenated blood away from the heart

• Transport nutrients to the body's cells

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

• Exchange of substances between blood and tissues

• Transporting oxygen to the lungs

• Regulating blood pressure

• Producing red blood cells

What is the role of red blood cells in the circulatory system?

• Produce insulin for the body

• Carry oxygen and carbon dioxide in the blood

• Regulate body temperature

• Store excess nutrients in the blood

What is the role of white blood cells in the circulatory system?

• Regulating the body's temperature

• Defending the body against infections and foreign invaders

• Transporting oxygen to the body's cells

• Producing insulin to control blood sugar levels