Question

account tracheal respiration in insects​

Answer 1

Answer:

In insects, the tracheal tubes primarily deliver oxygen directly into the insects' tissues. The spiracles can be opened and closed in an efficient manner to reduce water loss. This is done by contracting closer muscles surrounding the spiracle. In order to open, the muscle relaxes.

Explanation:

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Answer 2

Answer:

spiracles

Explanation:

Air enters the respiratory systems of insects through a series of external opening called spiracles.