Across
- 2. what is the name of the windpipe?
- 4. what are the tiny sacs of bag in your lungs?
- 7. which system help you breathe?
- 8. estimatly how much time does your heart beat a day?
Down
- 1. which air is released out while we breathe out?
- 3. which part of the body inhales air?
- 5. what pump blood all around the body?
- 6. what is the voice box?
- 9. can we control the heart beat?