Circulatory and Respiratory Systems

What does your heart do?

• pumps blood through your body

• protects your body

• helps your exercize

Your heart is about the size of your __________.

• mouth

• fist

• show

What do all organisms need to survive?

• energy

• blood

• carbon dioxide

• soil

What is the main function of the circulatory system?

• secrete enzymes

• digest proteins

• produce hormones

• transport materials

Which gas is transported by the circulatory system in humans and is used by cells during respiration to release energy stored in food?

• carbon dioxide

• nitrogen

• hydrogen

• oxygen

The circulatory system consists of what three parts?

• Heart

• Brain

• Blood

• Blood vessels

• Liver

Blood vessels that carry blood away from the heart.

• Veins

• Capillaries

• Arteries

These blood vessels help fight infection and other diseases.

• Red Blood Cells

• White Blood Cells

• Platelets

• Plasma

Blood vessels that carry blood to the heart.

• Veins

• Arteries

• Capillaries

The upper part of the heart is made up of two chambers called what?

• Ventricles

• Atria