multicellular anatomical structure placental basal plate 2023-09-14T08:19:13Z uberon UBERON:8600019 basal plate A maternal facing structure of the placenta, adjacent to the intervillous space. Major components of the placental basal plate include decidua basalis, fibrinoid, connective tissue, extravillous trophoblasts, and residues of degenerating villi and maternal vessels. PBP placenta basal plate basal plate AS placental disc