embryo development Flashcards
what is the survival rate of thawing embryos
80%
how long were the embryos frozen from IVF before they were thawed to produce the twins(fertility fun fact)
30 years(april 22, 1992-2022)
totipotency definition
base cell that can be differentiated into anything
characteristics of zygote to blastocyst stage
-cleavage(mitotic division, no increase in cell mass)
-blastomeres are equal(totipotent)
what stage is the embryo when it reaches the uterus
morula-early blastocyst
when does the embryo become more sensitive to stressors
when it enters the uterus
when does the embryo begin transcribing its own RNA
8-16 cells
what is the embryo surviving off of until it can begin producing its own RNA
maternal RNA
steps of zona hatching
-growth and fluid accumulation in blastocyst
-enzyme production of trophoblast cells
-expansion and contraction of blastocyst
what are trophoblast cells
outermost cells on embryo
gastrulation definition
-formation of germ layers
-function of germ layers
what organs arise from the ectoderm
-hair
-hooves
-skin
-nervous system
what organs arise from the mesoderm
-muscle tissue
-circulatory organs
-connective tissue
what organs arise from the endoderm
-glands
-liver
-inner lining of digestive system
what forms the embryo proper
the inner cell mass
