Interior
of right ventricle:
Internally it has two parts
1. inflowing
rough part due to trabeculae carneae (
muscular ridges of the heart ) and
2. outflowing smooth part also known as
infundibulum. The two part are separated by a muscular ridge known as
supraventricular crest.
The cavity of the right ventricle is crescent shape
in cross section because the interventricular septum make a bulge toward the
right ventricle.
Moderator band: (septomarginal trabeculum)
it is the unique features of the right ventricle , a
thick muscular ridge extending from the ventricular septum to the base of the
anterior papillary muscle. It conveys the right branch of the atrioventricular
bundle (bundle of His) , a part of conducting system of the heart .
Function : it prevent overdistension of heart
Trabeculae carneae of right ventricle:
Three types of muscular projections are present in
trabeculae carneae of right ventricle.
They are
1. Ridges
: fixed muscular elevations
2. Bridges
: two ends are fixed with central free portion
3. Papillary
muscles of right ventricle: are three in number : anterior , posterior and
septal.
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