Embryology 1-3 Flashcards
Embryology is concerned with…
The study of embryos and their development
First stage in development of a foetus
Fertilisation
Thirty hours after fertilisation…
The fertilised egg splits (oocyte) into two segments called blastomeres
At 16 cells, the group of cells are referred to as…
The morula
Within the first week, the morula reorganises to form…
A cavity known as the blastocoel
The blastocyst consists of…
An outer cell mass (trophoblast) and inner cell mass (embryoblast)
The trophoblast of the blastocyst
Outer cell mass of blastocyst which contacts with endometrium of uterus to facilitate implantation
Embryoblast…
Inner cell mass of blastocyst which develops into the embryo
During the second week, the trophoblast develops into the…
Syncytiotrophoblast and cytotrophoblast
During the second week, the embryoblast develops into…
Epiblast and hypoblast - bilaminar disc
Within the epiblast forms the
Amniotic cavity
During implantation of an embryo…
The maternal blood vessels (sinusoids) invade the spaces (lacunae) of the syncytiotrophoblast
Placenta praevia
Where the embryo implants low down on the uterine wall - higher chance of haemorrhage
Week 3 of embryo development
Gastrulation
Gastrulation involves…
Migration, invagination and differentiation of the epiblast
