Across
- 2. - blood contains an iron containing red pigment
- 7. - other name of food pipe
- 8. - gas exchange takes place
Down
- 1. - we breathe out
- 3. - Pair of spongy organs protected by Ribcage and supported by the muscle Diaphragm.
- 4. – Trachea divides into 2 tubes called
- 5. - carbon dioxide is carried by the bloo
- 6. - common passage for food and air.
- 7. - what we take in when we breath