Human Organ Systems

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Across
  1. 3. Running is an example of a good __________ for your muscles.
  2. 6. The process of inhaling and exhaling.
  3. 9. The ________ system breaks down the food you eat.
Down
  1. 1. This muscular organ pumps blood throughout your body.
  2. 2. Normal body __________ is about 37 degrees Celsius.
  3. 4. The lungs, kidneys, heart, and liver are examples of your body's _________.
  4. 5. Smoking affects this organ's ability to supply you with oxygen.
  5. 7. This red fluid circulates through your body.
  6. 8. This happens when you are hot or exercise a lot.