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spiracle
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spiracle
▪ I. spiracle1 (ˈspaɪərək(ə)l) Also 4 spyrakle, 5 -acle. [ad. L. spīrācul-um spiraculum. So older F. spiracle, F. spiracule, It. spiracolo, -aculo, Sp. and Pg. espiraculo.] † 1. Breath, spirit. Obs. Orig. after L. spiraculum vitae in Gen. ii. 7, vii. 22.13.. E.E. Allit. P. B. 408 Þenne mourkne in þe...
Oxford English Dictionary
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Spiracle
Spiracle or spiraculum may refer to:
Spiracle (arthropods), opening in the exoskeletons of some arthropods
Spiracle (vertebrates), openings on the surface
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Spiracle (vertebrates)
The spiracle is a small hole behind each eye that opens to the mouth in some fish. The gill opening was closed off from below, the remaining opening was small and hole-like, and is termed a spiracle.
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spiraculum
‖ spiraculum (spaɪˈrækjʊləm) Pl. -acula. [L. spīrāculum, f. spīrāre to breathe.] 1. = spiracle1 2 b.a 1668 R. Lassels Voy. Italy (1670) II. 295 There are divers spiracula, or Vents round about it, out of which the thick smoke presseth furiously. a 1705 Ray Disc. ii. (1713) 13 The enclosed Fire was n...
Oxford English Dictionary
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Spiracle (arthropods)
In some the muscle relaxes to open the spiracle, in others to close it. The timing and duration of spiracle closures can affect the respiratory rates of the organism.
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Dirrhope
They are similar to small microgastrines but the first metasomal segment is highly flattened with the spiracle on the median rather than lateral tergite
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Coelolepida
They have scales on their wings and on the first thoracic spiracle. They do not have ocelli.
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Palpada
Meron with fine pale hairs in front of or below spiracle.
Hind femur with basal patch of dense black setulae.
Cell r2+3 closed before wing margin.
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Respiratory system of insects
Structure of the spiracle
Insects have spiracles on their exoskeletons to allow air to enter the trachea. Air flow is regulated by small muscles that operate one or two flap-like valves within each spiracle—contracting to close the spiracle, or relaxing to
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Axia (moth)
Uniquely, they have a pair of pocket-like organs on the seventh abdominal spiracle of the adult moth which are possibly sound receptive organs.
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Diploptera punctata
Adults are chemically defended, having a modified tracheal gland and spiracle on each side which squirts quinones which can poison or discourage a predator
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Pseudobranch
In teleost fish, the pseudobranchs are mostly without respiratory function, and in elasmobranchs they are the gill arch of the spiracle.
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Prostigma
In flies of the order Diptera, the prostigma (also called stigma anteriore or anterior spiracle) is the anterior of the two pairs of spiracles opening
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Idionyx rhinoceroides
There is a narrow oblique citron-yellow stripe traversing the spiracle and another bordering the lower part of metepimeron.
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Idionyx corona
There is a vestigial
humeral yellow stripe, laterally a narrow oblique yellow stripe traversing the spiracle and another stripe on the lower border of
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