adj. [Gr. an, without; pneustos, breath]
1. Lacking external breathing organs.
2. (ARTHROPODA: Insecta)
Lacking spiracles, or supplied with nonfunctional spiracles, as in aquatic forms.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • apneustic — ap·neus·tic n(y)ü stik adj relating to, concerned with, or exhibiting apneusis <the apneustic area in the lower pons (S. W. Jacob & C. A. Francone)> …   Medical dictionary

  • Apneustic respirations — Apneustic respiration (a.k.a. apneusis) is an abnormal pattern of breathing characterized by deep, gasping inspiration with a pause at full inspiration followed by a brief, insufficient release.Accompanying signs and symptoms may include… …   Wikipedia

  • Apneustic center — The apneustic center of the lower pons appears to promote inspiration by stimulation of the I neurons in the medulla oblongata providing a constant stimulus.The apneustic centre of pons sends signals to the dorsal respiratory centre in the… …   Wikipedia

  • apneustic — /ap nooh stik, nyooh /, adj. Entomol. having no open spiracles, as the tracheal systems of certain aquatic insect larvae. [A 6 + Gk pneustikós pertaining to breathing, equiv. to *pneust(os) (verbid of pneîn to breathe) + ikos IC] * * * …   Universalium

  • apneustic — adj. lacking nostrils …   English contemporary dictionary

  • apneustic — ap·neus·tic …   English syllables

  • apneustic — (ˈ) ̷ ̷| ̷ ̷ stik adjective Etymology: a (II) + Greek pneustikos of or for breathing, from (assumed) Greek pneustos (verbal of pnein to breathe) + Greek ikos ic 1. of an insect larva : having all the spiracles absent or closed 2. : exhibiting… …   Useful english dictionary

  • apneustic center — the neurons in the brainstem that control normal respiration; not a true center …   Medical dictionary

  • Control of respiration — Control of ventilation refers to the physiological mechanisms involved in the control of physiologic ventilation. Gas exchange primarily controls the rate of respiration. The most important function of breathing is gas exchange (of oxygen and… …   Wikipedia

  • Respiratory system — See also: Respiratory tract Respiratory A complete, schematic view of the human respiratory system with their parts and functions. Latin …   Wikipedia

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