Across
- 2. the number of years it takes for a molecule of oxygen to move from lungs to feet, if diffusion were to be used
- 5. the theory of water absorption in plants more important at night time
- 10. most exchange of materials takes place here
- 12. this plugs leaks when there is an injury
- 13. ______ blooded animals can generally tolerate some mixing of the bloodstreams
- 15. liquid connective tissue
- 16. life on earth is based on _______ type of molecules
- 17. fundamental unit of a human kidney
Down
- 1. have relatively low energy needs than humans
- 3. the acid which activates pepsin
- 4. the only type of respitaion that uses the mitochondria
- 6. a useful waste product of plants
- 7. loss of water vapour through leaves and aerial parts of the plant
- 8. when food leaves the mouth after being crushed, it is called
- 9. mode of nutrition in humans
- 11. it is synthesised immediately after the energy is released during respiration
- 14. when we breathe in, we ______our diaphragm