Fertilization & First Week
The sperm must undergo this biochemical process to become capable of fertilization.
Capacitation
The two trophoblast layers formed during implantation
Cytotrophoblast & Syncytiotrophoblast
The structure that forms at the primitive node and extends cranially to help induce the neural tube.
Notochord
The term for the transition in which neural plate cells become mesenchymal and migrate inward.
Epithelial-to-mesenchymal transition (EMT)
The mesodermal structure that contributes to the diaphragm and separates the thoracic and abdominal cavities.
Septum transversum
The embryonic structure that forms after the morula and contains a blastocoele.
Blastocyst
The hormone secreted by the syncytiotrophoblast to maintain the corpus luteum.
hCG (human chorionic gonadotropin)
The germ layer that gives rise to bones, blood, and connective tissue.
Mesoderm
The failure of this neuropore to close results in a condition where the brain and skull do not form properly.
Cranial neuropore (leading to anencephaly)
The intraembryonic coelom divides into three cavities: name them.
Pericardial, pleural, and peritoneal cavities
The population of cells in the blastocyst that will become the embryo.
Inner cell mass (embryoblast)
The maternal blood-filled spaces that form within the syncytiotrophoblast during early implantation.
Lacunae
The two membranes that define the cranial and caudal ends of the developing gut tube.
Oropharyngeal membrane & Cloacal membrane
The embryonic cavity that expands and eventually surrounds the entire fetus.
Amniotic Cavity
The structure formed by lateral plate mesoderm that suspends intraperitoneal organs.
Dorsal Mesentery
The specific location within the female reproductive tract where fertilization most commonly occurs.
Ampulla
The structure that initially separates maternal and fetal blood.
Syncytiotrophoblast
The mesodermal structure that will eventually give rise to the vertebrae.
Somites/Sclerotomes
This mesodermal structure contributes to the development of the meninges, vertebrae, and skeletal muscles.
Paraxial mesoderm (somites)
The mesodermal structure that forms the urogenital system.
Intermediate Mesoderm
The last day of totipotency in week one.
Day 4 when the morula becomes a blastocyst
The uterine layer where implantation occurs.
Endometrium
The region of the primitive streak where epiblast cells ingress to form the notochord.
Primitive Node
Name three derivatives of neural crest cells.
Sensory and autonomic ganglia (DRG), Schwann cells, Craniofacial cartilage and bone, Melanocytes
The embryonic origin of the adult gastrointestinal tract.
Endoderm