How tissues are made from cells Pt1 L9 Flashcards
what is a fertilised egg called
zygote
what is a zygote made off
1 cell 2 pronuclei
what is cleavage
one cell splits to form 2 which splits to form 4
No cell growth, replicates nuclear material
where does cleavage happen
fallopian tubes
what is a morula
16-32 cells, can no longer see individual cells
on what day does a morula form
day 3
what does a morula become
a blastocyst
where does a blastocyst move
into the uterus
what does a blastocyst start to do
differentiate
protein synthesis
true growth
what forms around the outer ridge of the blastocyst
trophoblasts (TE)
what forms on the inside of the blastocyst
inner cell mast
what are the inner cell masts differentiation properties
pluripotent- any cell in the body apart from trophoblasts
what are the two types of inner cell mast cells
hypoblasts and epiblasts
what is the cavity formed in the blastocyst
blastocoel cavity
Epiblasts become —–>
ectoderm
hypoblasts become—->
endoderm
what cavity is formed from ectoderm
amniotic cavity
what cavity is formed from endoderm
yolk sac
what is mesoderm formed from
epiblast
where do mesoderm migrate through
the primitive streak
trilaminar disc=
ectoderm
mesoderm
endoderm
what forms the epithelial lining of the skin
ectoderm
what forms the nervous system
ectoderm
what forms teeth and enamel
ectoderm
