Data/hora: 09/06/2024 13:50:49

Biblioteca(s): 	Ebooks.	
Data corrente: 	01/02/2013	
Data da última atualização: 	01/02/2013	
Autoria: 	GLASS, M. L.; WOOD, S. C.	
Afiliação: 	Mogens L. Glass; Stephen C. Wood.	
Título: 	Cardio-Respiratory Control in Vertebrates: Comparative and Evolutionary Aspects.	
Ano de publicação: 	2009	
Fonte/Imprenta: 	Springer eBooks.	
Descrição Física: 	digital.	
ISBN: 	9783540939856	
DOI: 	10.1007/978-3-540-93985-6	
Idioma: 	Inglês	
Conteúdo: 	<P>The focus of this book is the evolution of cardiovascular and respiratory control in vertebrates. Life originated in water, which has constantly changing temperatures and O<SUB>2</SUB> levels. Fish gills can extract up to 80% of their inspired O<SUB>2</SUB>, because they have a countercurrent bloodstream. Oxygen sensors have been found within the gill arches of ray-finned fish such as carp and trout, and these O<SUB>2</SUB> sensors screen the inspired water and the capillary blood. </P> <P>Very likely, land vertebrates and the lungfish arose as a sister group, and both possess real lungs. Lungfish include 6 species, inhabiting shallow lakes or rivers, whereas the second ramification includes all the land vertebrates. A possible ancestor to the lungfish and land vertebrates has been discovered in China, and this fossil (Styloichthys) bridges a gap. Living 417 million years ago, it could represent one of the last ramifications before the common ancestor to the lungfish and land vertebrates. In addition, rather constant atmospheric O<SUB>2</SUB> levels permit a joint acid-base regulation by the lung and the kidney. Likewise, lungfish and land vertebrates share a central control of pulmonary ventilation, while the peripheral receptor contribution to acid-base regulation is minor. </P>	
Palavras-Chave: 	Animal Anatomy / Morphology / Histology; Evolution (Biology); Evolutionary Biology; Life Sciences; Morphology (Animals).	
Thesaurus Nal: 	animal physiology; human physiology.	
Categoria do assunto: 	--	
URL: 	http://dx.doi.org/10.1007/978-3-540-93985-6	
Registro original: 	Ebooks (Ebooks)