New perspectives on the evolution of lung ventilation mechanisms in vertebrates
@article{Brainerd1999NewPO, title={New perspectives on the evolution of lung ventilation mechanisms in vertebrates}, author={Elizabeth L. Brainerd}, journal={Experimental Biology Online}, year={1999}, volume={4}, pages={1-28} }
In the traditional view of vertebrate lung ventilation mechanisms, air-breathing fishes and amphibians breathe with a buccal pump, and amniotes breathe with an aspiration pump. According to this view, no extant animal exhibits a mechanism that is intermediate between buccal pumping and aspiration breathing; all lung ventilation is produced either by expansion and compression of the mouth cavity via the associated cranial and hyobranchial musculature (buccal pump), or by expansion of the thorax…
73 Citations
Functional morphology and evolution of aspiration breathing in tetrapods
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- 2006
Buccal oscillation and lung ventilation in a semi-aquatic turtle, Platysternon megacephalum.
- Environmental ScienceZoology
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The initiation of lung ventilation was found to occur in all phases of the buccal oscillation cycle, suggesting that the neural control mechanisms of the two behaviors are not coupled.
Mechanics of lung ventilation in a post-metamorphic salamander, Ambystoma Tigrinum.
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Exhalation in adult tiger salamanders is active during aquatic gulping breaths, whereas exhalation appears to be passive during terrestrial breathing at rest, supported by previous findings that terrestrial frogs ventilate their lungs with small tidal volumes and exhale passively, whereas aquatic frogs and salamander use large tidal volumes And exhale actively.
Evolutionary trends in respiratory mechanisms.
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It is suggested that these three independent valving circuits may have arisen in association with different pairs of segmental rhythm generators, and that all circuits continue to work together in a coordinated fashion to produce all types of breaths (including eupneic breaths and gasps).
Trade-offs in the Evolution of the Respiratory Apparatus of Chordates
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- 2009
Compared with the kinetic bronchoalveolar mammalian lung, the avian system combines a large surface area and thin air–blood barrier of the constant volume lung with ease of inflation of the air sacs, resulting in energy-efficient gas exchange.
CO2‐metabolism in early tetrapods revisited: inferences from osteological correlates of gills, skin and lung ventilation in the fossil record
- Environmental Science
- 2016
This study proposes a revised scenario of CO2-elimination in early tetrapods based on fossil evidence, that is recently identified osteological correlates of gills, skin structure and mode of lung ventilation, and suggests that internal gills were lost very early in stem amniote evolution.
Breathing in a box: Constraints on lung ventilation in giant pterosaurs
- GeographyAnatomical record
- 2014
Comparisons with modes of lung ventilation in extant amniotes suggests that the stiffened thorax, coupled with mobile gastralia and prepubic bones, may be most consistent with an extracostal mechanism for lung breathing in large pterodactyloids, perhaps similar to a crocodile‐like visceral displacement system.
The evolutionary origin of the mammalian diaphragm
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- 2010
Eye Movements in Frogs and Salamanders—Testing the Palatal Buccal Pump Hypothesis
- BiologyIntegrative organismal biology
- 2019
There is no experimental support for the idea of a palatal buccal pump in extinct temnospondyl amphibians, in contrast to earlier suggestions, and X-Ray Reconstruction of Moving Morphology is used to investigate eye movements during lung breathing and feeding in bullfrogs and axolotls.
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