Question

a)  What is the main job of your lungs?  (Select one)

• • To protect you against germs.

  • To pump blood through your body.

  • To remove wastes from your skin.

  • To let oxygen get into your body.

Question

b)  What is the main job of the human heart?  (Select one)

• • To get oxygen from the blood.

  • To control your breathing.

  • To pump blood through your body.

  • To control what you think.

Question

c)  What is the main job of your kidneys?  (Select one)

• • To make new red blood cells.

  • To help break down food.

  • To pump blood around the body.

  • To take wastes from the blood.