Ventricular Septation is
done by 2 separate components - superior
membranous and inferior muscular septum
Muscular Septum
It is a growth of
inferior wall
It is produced due to the
fusion of 3 components - right and left bulbar ridges and dorsal endocardial
cushion.
Membranous Septum
This is situated above
the muscular septum, fusion is continuous with septation of the outflow tract
In early stages of
development, outflow tract is a single tube called as bulbus cordis.
Bulbus cordis elongates
to form proximal conus arteriosus and distal
truncus arteriosus.
Two growths from wall in
spiral pattern, inferior upwards - separate tract into 2 channels.
The mesenchyme and neural
crest contribute to outflow septation process.
The fusion of outgrowths
separate aortic and pulmonary outflow.
