Tracheae

Tracheae open to the outside through small holes called spiracles. In the grasshopper, the first and third segments of the thorax have a spiracle on each side. Another 8 pairs of spiracles are arranged in a line on either side of the abdomen.
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tracheae: the branching network that extends from holes to all parts of an anthropod body to assist in gas exchange.
tracheids: the main conducting vessels of the xylem in most vascular plants.
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tracheae -- Internal tubes through which air is taken for respiration. Vertebrates with lungs have a single trachea carrying air to the lungs, ...
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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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trachea pl. tracheae
(trake-ee-a) [Gk. tracheia, rough]
Tiny air tubes that branch throughout the insect body for gas exchange.
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tracheae)
1. the windpipe; that portion of the respiratory tube that has C-shaped cartilaginous rings and passes from the larynx to two bronchi. 2. tiny air tubes that ramify throughout the insect body for gas exchange. 3.
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Terrestrial forms have book lungs (e.g., spiders) or tracheae. (e.g., insects). Book lungs are invaginations to serve in gas exchange between air and blood. Tracheae are air tubes that serve as ways to deliver oxygen directly to cells.
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The insect respires by means of air-filled internal tubes, the tracheae. This ectoderm-derived organ forms a highly branched tubular network which provides the organs with oxygen.
Lifecycle and ecology
Habitat ...
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In insects, the blood (more properly called hemolymph) is not involved in the transport of oxygen. (Openings called tracheae allow oxygen from the air to diffuse directly to the tissues).
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spiracle. An external opening of the system of ducts, or tracheae, that serves as a respiratory system in insects.
sporangium (plural: sporangia). A structure in which asexual spores are produced.
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