老师课件心血管系统发生

1、Good Morning Good Morning EveryoneEveryoneExtraembryonic capillary networks Intraembryonic capillary networks capillary networks fuse or disappear to form primitive cardiovascular system1. Development of the Cardiogenic areaCardiogenic area）Myoepicardial mantle myocardium epicardium Subendothelium s

2、ubendocardium心包横窦心包横窦 Pericardial sinus心包横窦心包横窦心肌膜心肌膜心胶貭心胶貭 three dilatationsPrimitive ventirclePrimitive atriumatrioventricular canal(1)Separation of the atrioventricular canalSeparation of the atrioventricular canal(2)Separation of the primitive atriumSeparation of the atriumSeparation of the atri

3、umappears in the right of the septum primumSeparation of the atriumoval passageSeparation of the atriumbefore birthafter birthblood can flow from right atrium toward the left atriumtwo septums fuse to separate atrium completely(3) Separation of the primitive ventricles Muscular part of interventricu

4、lar septumSeparation of the ventriclesInterventricular foramenSeparation of the ventriclesMembranous part of interventricular septum made up of bulbar ridge ,endocardial cushion and muscular part of interventricular septumSeparation of the ventricles（4 4）静脉窦的演变和永久性左、右心房的形成）静脉窦的演变和永久性左、右心房的形成Evolution of the sinus venosus and formation of the permanent atrium Separation of the two spiral ridges grow ， twist around each other and fuse to form a spiral aortico-pulmonary