1) What is the job of the heart? a) Pump blood b) Protect the body 2) What is the size of your heart? a) Foot b) Fist 3) What is your heart made of? a) Muscle b) Bone 4) What happens to your heart when you exercise? a) Gets faster b) Gets slower 5) How can you keep your heart healthy? a) Watch t.v. b) Exercise 6) What is the job of the lungs? a) Eat b) Breathe 7) What do you breathe in? a) Oxygen b) Carbon Dioxide

Circulatory & Respiratory Systems K - 1

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