The fetal-maternal circulation of the placenta. I. Histomorphologic, plastoid injection, and x-ray cinematographic studies on human placentas.

Abstract

Abstract X-ray cinematographic, plastoid injection, and histomorphologic studies attest the presence of an intracotyledonary space. Furthermore, the intervillous spaces are intervillous capillary spaces formed by densely packed and frequently connecting terminal villi. On the basis of our findings, a hemodynamic mechanism is suggested which would account for the hydrostatic forces necessary for an effective transfer of water-soluble and other substances from the intervillous capillary spaces to the fetal capillary system.