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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
ectoderm somatopleure amnion yolk-sac extraembryonic-coelom cavitation trophoblast mesoderm embryonic-membrane chorioallantois excretory gaseous chorionic-villi villous placenta allantois amniota-3 germ-layer list-of-subjects-in-gray-s-anatomy-i-embryology medical-subject-headings chorion-company cytotrophoblast syncytiotrophoblast process-anatomy decidua embryo umbilical-vessels umbilical-artery umbilical-vein pregnancy chorion amniotic-sac boston-university 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 endoderm splanchnopleure chordamesoderm paraxial-mesoderm somite somitomere sclerotome myotome cutis-plate intermediate-mesoderm lateral-plate-mesoderm intraembryonic-coelom uterus blastocoele heuser-s-membrane vitelline-duct umbilical-cord wharton-s-jelly intervillous-space gestational-sac amniotic-cavity-2 histogenesis organogenesis limb-development limb-bud apical-ectodermal-ridge chorioadenoma chorioangioma choriogenesis amniochorial choriocele amniochorionic allantochorion monochorionic diffuse-placenta