title: Development of the pars membranacea septi interventricularis of the human heart. II. Thickness change.
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.
authors.affiliation: Department of Morphology, Escola Paulista de Medicina, São Paulo, Brazil.
authors.forename: R R
authors.initials: RR
authors.lastname: Figueira
authors.forename: J C
authors.initials: JC
authors.lastname: Prates
authors.forename: H
authors.initials: H
authors.lastname: Hayashi
mesh_terms: D005318:Fetal Heart / Q000033:anatomy & histology*; D005865:Gestational Age; D006346:Heart Septum / Q000196:embryology*; D006801:Humans