IE users: please get the latest browser version at Microsoft Internet Explorer Home Page
if yot already have the latest browser version please verify that your browser settings is not in compatibility mode
Endocardial cushion cells sit within the cushion matrix. Before they detach from their epithelial layer and migrate to the cushion matrix, they begin to swell, while the cisternae of rough endoplasmic reticulum and golgi complex dilate. The cells then begin to separate and take on a mesenchymal appearance. Once the cells separate from the epithelial layer, they migrate to and situate themselves within the cardiac jelly formed by the myocardium.