The ventilation of insect tracheal tubes is dependent upon the presence of:

Name: The ventilation of insect tracheal tubes is dependent upon the presence of:
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Insects breathe through a network of air tubes called tracheae, which open to the outside through small openings called spiracles. Spiracles are the primary means through which air enters and exits the insect's body, facilitating gas exchange directly with tissues.

The Ventilation of Insect Tracheal Tubes Is Dependent Upon the Presence