Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Embryonic Vertebrate Heart Tube Is a Dynamic Suction Pump
Ist Teil von
Science (American Association for the Advancement of Science), 2006-05, Vol.312 (5774), p.751-753
Ort / Verlag
Washington, DC: American Association for the Advancement of Science
Erscheinungsjahr
2006
Quelle
American Association for the Advancement of Science
Beschreibungen/Notizen
The embryonic vertebrate heart begins pumping blood long before the development of discernable chambers and valves. At these early stages, the heart tube has been described as a peristaltic pump. Recent advances in confocal laser scanning microscopy and four-dimensional visualization have warranted another look at early cardiac structure and function. We examined the movement of cells in the embryonic zebrafish heart tube and the flow of blood through the heart and obtained results that contradict peristalsis as a pumping mechanism in the embryonic heart. We propose a more likely explanation of early cardiac dynamics in which the pumping action results from suction due to elastic wave propagation in the heart tube.