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Definitions of chorion:
  • noun:   outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)



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Alternative Terms
sac fetal placenta chicken ectoderm mesoderm germ-layer notochord embryo list-of-subjects-in-gray-s-anatomy-i-embryology medical-subject-headings villus chorion umbilical-artery umbilical-vein trophoblast umbilical-vessels pregnancy cytotrophoblast syncytium syncytiotrophoblast hofbauer-cell public-domain gray-s-anatomy human-embryogenesis prenatal-development fetus carnegie-stages zygote morula blastula blastomere blastocyst inner-cell-mass bilaminar-disc hypoblast epiblast trilaminar-embryo archenteron primitive-streak primitive-pit primitive-knot blastopore primitive-groove gastrula neuroectoderm somatopleure-2 endoderm splanchnopleure chordamesoderm paraxial-mesoderm somite somitomere sclerotome myotome cutis-plate intermediate-mesoderm lateral-plate-mesoderm intraembryonic-coelom uterus blastocoele yolk-sac heuser-s-membrane extraembryonic-coelom vitelline-duct umbilical-cord wharton-s-jelly allantois decidua intervillous-space gestational-sac amniotic-sac amniotic-cavity-2 histogenesis organogenesis limb-development limb-bud apical-ectodermal-ridge hemoendothelial-placenta adrenoleukodystrophy-diagnosis genetic-testing-aftercare glycogen-storage-diseases-prevention lipidoses-prevention lipidoses-diagnosis genetic-testing-risks peroxisomal-disorders-prevention alpha-fetoprotein-afp