Which is the main function for the circulatory system? More than one answer is correct.

• It transports nutrients to the cells

• It transports oxygen to the cells

• It allows the exchange of gases in the lungs

• It transports waste to the kidneys and lungs

Liquid that travels through arterys, veins and capillaries

Which is not a blood vessel?

• Artery

• Vein

• Capillaries

• Heart

Arteries are blood vessels rich in oxygen

• True

• False

Veins are blood vessels rich in CO2

• True

• False

Veins are blood vessels that take blood from tissues to the heart

• True

• False

Arteries are blood vessels that take blood from the heart to other organs or tissues

• True

• False

What is the name for the structure marked with an arrow

What is blood made of?

• Red and white blood cells

• Red blood cells and plasma

• Platelets and plasma

• Red blood cells, white blood cells, platelets and plasma

Where are blood cells produced?

• In the heart

• In the brain

• In the bones

• In the stomach