... and tissue replacement in the gills remain poorly understood. By contrast, the mammalian lung is a largely quiescent organ in adults but is capable of facultative regeneration following injury. In the course of the past decade, it has been recognized that lungs contain a population of stem or progenitor...

... or partially under hypoxia (15% O 2 during days 12 to 18). Lung structures, including air capillaries, blood capillaries, infundibula, atria, parabronchial lumen, bronchi, blood vessels larger than capillaries and interparabronchial tissue, in 1- and 10-day-old chicks were analyzed using light microscopy...

... computerized tomographic (CT) scans of live penguins were utilized to measure lung volumes, air sac volumes, tracheobronchial volumes and total body volumes at different inflation pressures in three species with different dive capacities [Adélie ( Pygoscelis adeliae ), king ( Aptenodytes patagonicus...

...Suzanne L. Munns SUMMARY High gestational loads result in fetuses that occupy a large proportion of the body cavity and may compress maternal organs. Compression of the lungs results in alterations in breathing patterns during gestation, which may affect the energetic cost of breathing...

... of metabolism and body temperature (arousal). Remarkably, the repetitive stress of cooling–rewarming and hypoxia does not cause irreversible organ damage. To identify adaptive mechanisms protecting the lungs, we assessed histological changes as well as the expression and localization of proteins involved...

[email protected] ; [email protected] 4 2 2008 © The Company of Biologists Limited 2008 2008 pitch roll aquatic locomotion lung alligator Alligator mississippiensis archosaur crocodilian diaphragm diaphragmaticus ischiopubis rectus abdominis intercostalis buoyancy...

... Limited 2007 2007 acid–base balance ventilation lung gill kidney acidosis alkalosis African lungfish Protopterus annectens The regulation of metabolic acid–base disturbances can occur through the control of ventilation and/or the direct transfer of acid–base equivalents between...

...) activity on pulmonary and branchial/cutaneous gas transfer. In contrast to previous studies on Protopterus , which showed that the vast majority of CO 2 is excreted into the water through the gill and/or skin whereas O 2 uptake largely occurs via the lung, P. dolloi appeared to use the lung for the bulk...

...Roger S. Seymour; Sue Runciman; Russell V. Baudinette; James T. Pearson SUMMARY Quantitative methods have been used to correlate maximal oxygen uptake with lung development in Australian pelicans. These birds produce the largest altricial neonates and become some of the largest birds capable...

...Sonya D. Johnston; Christopher B. Daniels; David Cenzato; Jeffrey A. Whitsett; Sandra Orgeig SUMMARY Pulmonary surfactant (PS), a mixture of phospholipids (PL), neutral lipids and surfactant proteins (SP), lowers surface tension within the lung, which increases lung compliance and improves...

.... This study correlates the presence of surfactant proteins (SP-A, SP-B and SP-D), using immunohistochemistry, with the ex-utero development of the lung in the tammar wallaby Macropus eugenii and also investigates the control of phosphatidylcholine (PC) secretion from developing alveolar type II cells. All...

...John N. Maina; Christopher Nathaniel SUMMARY The ostrich lung, with its lack of interparabronchial septa, the presence of very shallow atria and exceptional morphometric refinement, structurally resembles those of small, energetic flying birds, whereas it also displays features characteristic...

...S. C. Land; A. Collett ABSTRACT A self-referencing Cl−-selective microelectrode (Cl − SrE) was developed and used to detect changes in the direction and magnitude of the Cl − flux ( J Cl ) from the apical region of cultured foetal distal lung epithelial cells (FDLEs) as a function of external Cl...

... capillary blood volume and a remarkably extensive alveolar surface area in certain species developed in a remarkably large lung. These factors were augmented by, for example, exceptionally high venous haematocrits and haemoglobin concentrations. In birds, a particularly large respiratory surface area...

... lung are basically similar in all birds, the morphological differences observed between G. g. domesticus and C. livia suggest that either the mechanism of production of IAV or its functional efficiency may be different, at least in these two species of birds. * e-mail: [email protected]...

...P. J. Ponganis; G. L. Kooyman; R. Van Dam; Y. LeMaho ABSTRACT To evaluate blood N 2 uptake and the role of the respiratory volume (air sacs/lungs) as a N 2 and O 2 reservoir in deep-diving penguins, diving respiratory volume ( V DR), heart rate ( f H), venous , blood volume ( V b ) and hemoglobin...

... the proteins associated with surfactant isolated from lung lavage of this species, and used electron microscopy and immunohistochemistry to examine the surfactant structures and the subcellular localisation of these proteins. The epithelial lining of the gas-exchange region of the lungfish lung consists of one...

... − –H + equilibration in blood-perfused turtle ( Pseudemys scripta ) lungs. Turtle lungs perfused in situ with red cell suspensions containing inhibitors of erythrocyte anion exchange and/or pulmonary and red cell carbonic anhydrase produced significant postcapillary blood and pH disequilibria, while...

... that these bursts correspond to fluctuations in buccal and lung pressures and to bursts of activity in the buccal levator muscle H3a. This demonstrates that the rhythmic bursting activities recorded in vitro represent fictive gill and lung ventilation. To investigate the ontogeny of central respiratory...

... in the dorsal sinuses. These pressure pulses help drive hemolymph through the lungs. The coupled SG reversed ventilation and DVM-assisted increases in lung perfusion appear to be an adaptation to increase gas exchange at the lungs. When crabs are made hyper-or hypotensive by changes in hemolymph volume, the EMG...