Across
- 2. between atrium and ventricle to prevent blood from flowing backwards
- 4. air sacs at the end of bronchioli and where gas exchange happens
- 6. organism whose cells contain a nucleus
- 7. jaw
- 10. collarbone
- 11. a unicellular organism that doesnt have a nucleus
- 14. the only voluntary muscle tissure
Down
- 1. cardiac and smooth muscle tissues
- 3. connect bone to bone
- 5. vocal cords
- 8. throat
- 9. under your lungs and increases and decreases your chest capacity
- 10. section in your heart
- 12. blood vessels that carry blood to cells, also connects veins and arteries
- 13. thiegh
- 15. attaching muscles to bones