part of part of surrounds surrounds extraembryonic cavity intervillous space 2023-12-12T11:50:32Z An anatomical space that separates the basal plate and the chorionic plate. The intervillous space is filled with endometrial gland secretions during early stages of the pregnancy and later perfused with maternal blood, bathing the chorionic villous tree. UBERON:8600025 chorionic villous tree placental disc Aleix Puig-Barbé