Primitive ventricle
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| Embryology: 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 | |
| Dorlands/Elsevier | / | |
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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