primitive streak Flashcards
1
Q
where is primitive streak seen?
A
midline of epiblast layer
2
Q
what does primitive streak represent?
A
the epiblasts migrating through primitive streak to form mesoderm and endoderm
3
Q
how does endoderm form? what color?
A
endoderm represented as yellow. on days 14 and 15, ingressing epiblast cells replace the hypoblast to form endoderm
4
Q
how does intraembryonic mesoderm form?
A
epiblast that ingresses on day 16 migrates between endoderm and epiblast layers to form mesoderm
5
Q
how does ectoderm form?
A
epiblast becomes ectoderm. blue.
