<prompt> The foetal blood is separated from syncytiotrophoblast with all except:Fetal blood capillary membraneMesenchyme of intervillous blood spaceCytotrophoblastDecidua parietalis  <response>: The maternal blood in the lacuna is never in direct contact with fetal blood. They are separated by:SyncytiotrophoblastCytotrophoblastBasement membraneMesodermEndothelium of fetal capillariesTogether called as placental barrier or membrane 0.025 mm 