- Primitive ventricle
Infobox Embryology
Name = PAGENAME
Latin =
GraySubject = 135
GrayPage = 512
Caption = Heart of humanembryo of about fourteen days.
Caption2 = Interior of dorsal half of heart from a humanembryo of about thirty days.
System =
CarnegieStage = 11
Precursor =
GivesRiseTo = trabeculated parts ofright ventricle ,left ventricle
MeshName =
MeshNumber =
DorlandsPre =
DorlandsSuf =
The primitive ventricle of the developing heart gives rise to the trabeculated parts of the left and right ventricles. In contrast, the smooth parts of the left and right ventricles originate from the embryologicalbulbus cordis .The primitive ventricle becomes divided by a
septum , theseptum inferius orventricular septum , which grows upward from the lower part of the ventricle, its position being indicated on the surface of the heart by a furrow.Its dorsal part increases more rapidly than its ventral portion, and fuses with the dorsal part of the
septum intermedium .For a time an
interventricular foramen exists above its ventral portion, but thisforamen is ultimately closed by the fusion of theaortic septum with the ventricular septum.
=AdditionalExternal links
* [http://sprojects.mmi.mcgill.ca/embryology/cvs/early_chambers.html Overview at mcgill.ca]
* [http://www.med.umich.edu/lrc/coursepages/M1/embryology/embryo/13cardiovascular_system.htm Description and diagram at umich.edu]
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