Primitive ventricle
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| Primitive ventricle | ||
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| Heart of human embryo of about fourteen days. | ||
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| Interior of dorsal half of heart from a human embryo of about thirty days. | ||
| Gray's | subject #135 512 | |
| Carnegie stage | 11 | |
| Gives rise to | right ventricle, left ventricle | |
The primitive ventricle becomes divided by a septum, the septum inferius or ventricular 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 this foramen is ultimately closed by the fusion of the aortic septum with the ventricular septum.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Heart development - Primitive atrium - Primitive ventricle - Bulbus cordis - Truncus arteriosus - Ostium primum - Foramen ovale - Ductus venosus - Ductus arteriosus - Aortic arches - Septum primum - Septum secundum - Cardinal veins
