0 relating to a membrane or like a membrane (= a very thin layer of tissue that covers or connects parts of the body):
When a remnant of the interventricular membranous septum is also present, the so-called membranous flap, it lies immediately on top of the atrioventricular bundle.
The membranous atrioventricular septum can itself also very rarely be deficient in isolation.
Perimembranous defects were those localized in the area usually occupied by the membranous septum.
For the most part, among those hearts with discordant ventriculoarterial connections, the ventricular septal defect is muscular, as the membranous septum has not been formed.
In such instances, the leaflet tissue is excised, leaving the base of the septal tissue intact at die membranous part of the septum.
In addition, phase contrast was often reduced after application of agonists, which is, apparently, related to the loss of intracellular membranous inclusions.
All membranous boundary structures in contemporary forms of life incorporate a lipid bilayer as the primary barrier to free diffusion of solutes.
It represents the atrioventricular component of the membranous septum.
