Human Placenta's Structure

Description

Placenta and umbilical cord dominate the frame, with the chorionic plate forming the fetal surface and radiating chorionic vessels converging toward the cord insertion. Along the opposite, maternal aspect, the basal plate is organized into lobulated cotyledons separated by placental septa, giving the disc a segmented relief that reads well in a single fixed perspective. The cord attaches centrally to eccentrically on the fetal side and courses away from the placental mass, contrasting the smoother chorionic surface with the more rugged cotyledonary maternal face. Orientation cues support description in anatomical terms, with the chorionic plate positioned superiorly relative to the cotyledonary surface, and the cord emerging from the inferior aspect as stated. Placental surface anatomy matters because it anchors how clinicians think about uteroplacental exchange and about where pathology tends to localize, from retroplacental hematoma in placental abruption on the maternal side to abnormal adherence in placenta accreta spectrum at the decidua basalis. The relationship between chorionic plate, cotyledons, and cord insertion also frames obstetric discussion of velamentous or marginal insertion and vasa previa, where fetal vessels traverse membranes rather than being protected by Wharton’s jelly within the cord. One organ, two circulations. For teaching, this illustration fits gross anatomy and embryology blocks when introducing fetal versus maternal components, and it supports OB lectures on third stage labor, retained placenta, and postpartum hemorrhage by making the cotyledonary pattern and basal plate easy to reference in captions. Medical publishers can also pair it with diagrams of chorionic villi, intervillous space, and spiral artery remodeling to connect macroscopic landmarks to histology and Doppler concepts. Anatomical accuracy verified by SciePro's Medical Advisory Board.