How does gas exchange take place in insects?
1 Answer
Nov 17, 2016
Gas exchange in insects takes place through trachea, the air tubes, which terminally branch in tracheoles.
Explanation:
Size of the insects is so small that the trachea, chitin-lined air tubes, carry air up to each tissue of the body.
Actual respiratory gases are transported as per gas law. This is from higher concentration to lower.
Through metabolism oxygen is constantly utilized in the body. In tracheal tubes more oxygen is present which is made available to tissues.
Opposite is true for carbon dioxide.
Trachea opens outside through opening called spiracle. There are multiple paired spiracles in insects.
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