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