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Spiracles


Spiracles open into large tracheal tubes. These, in turn, lead to ever-finer branches. The branches penetrate to every part of the body.
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spiracles: a series of openings on the body surface of terrestrial arthropods that open into tiny air tubes that assist in gas exchange.
spirilla: flexible spiral bacteria (singular, spirillum).
spirochetes: rigid spiral bacteria.
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Spiracles: The external openings of the insect breathing (tracheal) system, found along the abdomen.
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spiracles
Minute pores distributed over the surface of an insect's body that serve as entrances to the tracheal system.
Covered in Lab 12 Animal Diversity II ...
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Insects use tracheal respiration with openings on the sides of the thorax and abdomen called spiracles leading to the tubular tracheal system. Air reaches internal tissues via a network of branches from the tracheal system.
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They exchange gases through a tracheal system, with external openings called spiracles dividing into finely branched tubules that carry gases directly to metabolizing tissues.
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tracheae The small tubes that carry air from spiracles through the body cavity of an arthropod; arthropod tracheae are modifications of the exoskeleton.
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spiracle -- In insects and some other terrestrial arthropods, a small opening through which air is taken into the tracheae. Insects have several spiracles, arranged along the sides of the abdomen.
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