Preferred Label : Membranous part of interatrial septum;
FMA definition : Membranous part of cardiac septum which has as its parts the endocardium of interatrial
septum and fibroelastic connective tissue of endocardium and is continuous with the
membranous part of interventricular septum.;
Synonyme FMA : Pars membranacea (septi interatrialis); Membranous interatrial septum;
Membranous part of cardiac septum which has as its parts the endocardium of interatrial
septum and fibroelastic connective tissue of endocardium and is continuous with the
membranous part of interventricular septum.