Embryonic ventricle

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Embryonic 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.
Latin ventriculus embryonicus
Gray's p.512
Carnegie stage 11
Gives rise to trabeculated parts of right ventricle, left ventricle
Code TE E5.11.1.3.1.0.2

The embryonic ventricle or 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 embryological bulbus cordis.

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 incorporates text from a public domain edition of Gray's Anatomy.