Biology 3338A Lecture Notes - Lecture 20: Notochord, Oviduct, Regional Differentiation
9 Jul 2016
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* you start off with blastodisc, some cells die so you are left with marginal zone and an epiblast. Cells form hypoblast (some cells come from epiblast and some come from. * there is a group of cells in pmz called koller sickle cus they look like a sickle (part of. * so you form hypoblast which forms blastocoel cavity. Once you form blastoceal cavity, cells from epiblast ingress into blastoceal cavity (these are cells expressing. Hnk1; have specific determinants in them), once they ingress, they undergo convergent extension and go from posterior to antrerior. * when you are looking down on the embryo, you see cells that come from epibloast have this sort of congregation near the pmz and then they extend form anterior towards anteior. * you start off with an embryo that forms the blastoceal cavity. Cells ingress from epiblast and start undergoing convergent extension (cells coming down from epiblast into blastoceal).
