<P> 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 . This network of transverse and longitudinal tracheae equalizes pressure throughout the system . </P>
<P> 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 . This network of transverse and longitudinal tracheae equalizes pressure throughout the system . </P>
what is the series of tubes used to distribute the air called in a grasshopper
what is the series of tubes used to distribute the air called in a grasshopper
tracheae
tracheae