Question

1)exhaled air is rich in ________.
2)muscle cramps are caused due to_____of lactic acid in muscle cells.
3)network of air tubes inside the body of insects is called _______.
4)gills are respiratory organs found in_______.
5)earthworms and______ breathe through their moist skin.
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Answer 1

Answer:

carbon dioxide

accumulation

trachea

fishes

Answer 2

1.carbon di oxide

2. formation

3. spiracles

4. fish

5. frog

Explanation:

follow