Question

Insects have a network of branched tubes called _______________________ for respiration which open on the surface of their bodies through _____________________. (Fill in the blanks respectively)

Answer 1

Answer:

Air enters the respiratory systems of insects through a series of external openings called spiracles. These external openings, which act as muscular valves in some insects, lead to the internal respiratory system, a densely networked array of tubes called tracheae

Explanation:

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Answer 2

Answer:

Insects have a network of air tubes called tracheae for gas exchange. Oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body.

Explanation:

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