RESPIRATION IN ORGANISMS
Across
- 2. Muscular floor of chest cavity
- 3. The respiratory organs of human beings
- 5. An organism with tracheal system
- 6. Tiny pores on the surface of leaf
- 8. The air tubes of insects
- 9. Openings on the sides of the body of an insect
Down
- 1. Skeletal structures surrounding chest cavity
- 4. The openings through which we inhale
- 7. An anaerobic organism