Development of the pars membranacea septi interventricularis of the human heart. II. Thickness change. |
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| Authors: | R R Figueira J C Prates H Hayashi |
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| Institution: | Department of Morphology, Escola Paulista de Medicina, S?o Paulo, Brazil. |
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| Abstract: | The measurement of the thickness of the pars membranacea septi interventricularis of the human heart increases with the intra-uterine age of the fetus along a steep, ascending, straight line. The thickening of the PMSI occurs in phase I of the development from 0.246 mm (CR = 16.8 mm) to 0.524 mm (CR = 119 mm) and in phase II from 0.601 mm (CR = 149 mm) to 1.024 mm (CR = 362 mm). The thickness increases, then, from the ending of the closure of the secondary interventricular foramen to the end of the fetal period. |
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