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nostrils | chest | diaphragm |
downwards | ribs | 21% |
air | 16.4% | hair |
skin | trachea | spiracles |
gills | cutaneous | heart |
1. The two openings in the nose is known as.
2. At the time of inhalation themove outwards.
3. The cockroaches have small openings known ason the sides of their body.
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