The early development of the tunica media in the vascular system of rat embryos

The use of a monoclonal antibody (HHF-35) against muscle-cell-specific actin has led to new insights into the early development and differentiation of the tunica media of blood vessels. The localization of this substance was studied by light and electron microscopy, in 22 rat embryos ranging between 10 and 15 days post coitum.