In Velella the pneumatophore becomes of complex structure and sends air-tubes, lined by a chitin and resembling tracheae, down into the compact coenosarc, thus evidently serving a respiratory as well as a hydrostatic function. [Please select]
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: in the plural the lateral openings on the segments of the insect body through which air enters the tracheae:= stigmata. [Please select]
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Tracheoles: the capillary trachea of the adult as they develop in masses in the larva: very small, slender tracheae. [Please select]
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This is the cord of tracheae communicating between one breathing-hole and another. [Please select]
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Pelotons: the balls of fine tracheae in larvae, developed to supply the adult organism. [Please select]
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Plexus: a knot: applied to a knot-like mass of nerves, or tracheae. [Please select]
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Expiratory: relating to the act of expiration, when the abdomen is contracted and the air contained in the abdominal tracheae is presumably forced out of them. [Please select]
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