Morphology of the airways and lung parenchyma in hatchlings of the loggerhead sea turtle, Caretta caretta

Journal of Morphology
Jane N Fleetwood, John F Munnell

Abstract

Light microscopy as well as scanning and transmission electron microscopy revealed the lungs of loggerhead sea turtle (Caretta caretta), hatchlings to be multichambered with several separate open chambers communicating with a cartilage-reinforced central intrapulmonary bronchus. This central bronchus is structurally analogous to an oversized mammalian respiratory bronchiole. The subsequent branching airways, chambers and niches, are in many ways structurally and functionally similar to mammalian alveolar ducts and alveolar sacs, respectively. The airways are lined by a pseudostratified, columnar epithelium comprised of ciliated, nonciliated secretory, and basal cells. Histochemically, the epithelium is found to contain cells secreting both sialomucins and sulfomucins, as well as a neutral serous secretion. Small granule cells, a type of neuroendocrine cell similar to those seen in mammals, are scattered among the other airway cells. The gas-exchange areas, termed ediculae, are lined by the respiratory type I and type II pneumocytes, as in mammals. Abundant smooth muscle is seen in the trabeculae and interedicular septa of the lung tissue. © 1996 Wiley-Liss, Inc.

References

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Citations

Nov 13, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Mario RicciardiAntonio Di Bello
May 1, 1999·Archives of Histology and Cytology·A Van LommelJ M Lauweryns
Mar 14, 2013·BioMed Research International·Andrew MakanyaValentin Djonov
Feb 4, 2009·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Steven F PerryJonathan R Codd
Mar 19, 2016·Birth Defects Research. Part C, Embryo Today : Reviews·Andrew N Makanya
May 23, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·C B Daniels, S Orgeig
Nov 24, 2004·Respiratory Physiology & Neurobiology·Steven F Perry, Martin Sander

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