Across
- 1. Main substance used to release energy in respiration.
- 4. Green Pigment that absorbs sunlight.
- 5. Respiration without oxygen.
- 10. Process that plants use to make sugars.
- 12. Plants store sugars in this form.
- 13. Protect lungs and heart.
- 14. Largest artery in body.
- 15. Vessel returning deoxygenated blood to the heart.
- 16. Muscle that contracts during Inhalation.
Down
- 2. Structure in the leaf that allows carbon dioxide in and oxygen out.
- 3. Sac like structures that are involved in gas exchange in animals.
- 4. Organelle where photosynthesis takes place.
- 6. Gas that stays the same in exhaled and inhaled air.
- 7. Disease caused by smoking.
- 8. Organelles where most respiration occurs.
- 9. Disease that causes the constriction of the airways.
- 11. Root hair cells maximise this to aid in the absorbance of minerals.