chorion
Outermost fetal covering
The chorion is the outermost membrane surrounding an embryo in reptiles, birds, and mammals.
In humans, it forms the fetal contribution to the placenta, facilitating nutrient and gas exchange between mother and fetus.
Chorionic villus sampling is a prenatal diagnostic procedure.
The chorion also refers to the protective outer layer of an insect egg.
Fetal enclosing membrane
- yolk sacEmbryonic nutrient reservoir
- deciduaModified uterine lining for implantation
- serosaFluid-secreting tissue layer
- trophoblastEmbryonic implantation cells
syncytiotrophoblast · villi · mesoderm · epithelium · basement membrane · lamina · fibrous · connective tissue
Carrying offspring in womb
- fetusGestating offspring
- pregnancyCarrying developing offspring
- uterusFemale reproductive organ
- amniotic fluidLiquid protecting unborn offspring
trimester · prenatal · CVS · ultrasound · gestational · fetal · antenatal · obstetrics
Fetal nourishment organ
- umbilical cordFetal-placental connection
- implantationEmbedding into tissue
- deciduaModified uterine lining for implantation
- villiIntestinal absorptive protrusions
hCG · blood supply · nutrients · hormones · endometrium · preeclampsia · villous · lacunae
Early developmental stage before implantation
- trophoblastEmbryonic implantation cells
- gastrulationEmbryo forms primary layers
- ectodermEmbryo's outer cell layer
- endodermInnermost embryonic tissue layer
embryogenesis · fertilization · zygote · morphogenesis · gastrula · cleavage · implantation · inner cell mass
Obstruction preventing passage
- enclosureConfined, bordered space
- insulationThermal transfer prevention
- cushioningSoftening force or fall
- containmentPreventing hostile expansion
envelope · surrounding · encasing · sheath · lining · buffer · separation · compartment
amnion
Fetal enclosing membrane
- yolk sacEmbryonic nutrient reservoir
- deciduaModified uterine lining for implantation
- serosaFluid-secreting tissue layer
trophoblast · syncytiotrophoblast · villi · mesoderm · epithelium · basement membrane · lamina · fibrous · connective tissue · semipermeable
gestation
Carrying offspring in womb
amniotic fluid · trimester · prenatal · CVS · ultrasound · gestational · fetal · antenatal · obstetrics · perinatal
placenta
Fetal nourishment organ
- umbilical cordFetal-placental connection
- implantationEmbedding into tissue
- deciduaModified uterine lining for implantation
villi · hCG · blood supply · nutrients · hormones · endometrium · preeclampsia · villous · lacunae · cotyledons
blastocyst
Early developmental stage before implantation
- trophoblastEmbryonic implantation cells
- gastrulationEmbryo forms primary layers
- ectodermEmbryo's outer cell layer
endoderm · embryogenesis · fertilization · zygote · morphogenesis · gastrula · cleavage · implantation · inner cell mass · blastomere
barrier
Obstruction preventing passage
- enclosureConfined, bordered space
- insulationThermal transfer prevention
- cushioningSoftening force or fall
containment · envelope · surrounding · encasing · sheath · lining · buffer · separation · compartment
reptilian
Of snakes and lizards
- pregnancypregnancy, pregnant, prenatal care, due date, weeks
- childbirth anatomyuterus, womb, placenta, umbilical cord, cervix
- body layersmembrane, plasma membrane, cell membrane, epidermis, dermis
- embryonic structuresembryo, fetus, zygote, blastocyst, morula
- membranescell membrane, plasma membrane, cell membranes, nuclear membrane, basement membrane
- placentaplacenta, umbilical cord, amnion, yolk sac, amniotic fluid