Across
- 4. ______other word for heart beats per second
- 6. a muscular organ about the size of your fist
- 8. a tube that tranport blood
- 10. we need oxygen,_________ and water
Down
- 1. a system that transport water,oxygen and digestedfoodheart
- 2. heart rate depends on age and_____
- 3. ____________and waste materials are removed
- 5. heart rate depends on health and_____
- 7. a red substance
- 9. a sound when your heart beats