Gastrulation Flashcards
The process by which one group of cells or tissues causes another set of cells or tissues to change their fate?
Induction
What produces the signal?
Inducer
What responds to the signal?
Responder
What is gastrulation?
Process by which the epiblast forms all 3 germ layers (ectoderm, mesoder, endoderm).
What is the primitive streak?
Part of epiblast which orchestrates dorsal-ventral and cephalic-caudal axes
What happens during invagination?
Epiblast cells migrate through primitive streak and repopulation the hypoblast to form the definitive endoderm.
What is the mesoderm?
Cells between the ectoderm and endoderm
Mesenchylmal cells are what?
Embryonic connective tissue that originates from the mesoderm.
What happens in Epithelial Mesenchymal Transition (EMT)?
Epithelial cells lose their organization and migrate as mesenchymal cells where they help to form the mesoderm and neural tube.
From what end does the prechordal plate originate?
cephalic (cranial)
The prechordal plate allows for part of the embryo to develop?
Oropharyngeal membrane
Future site of oral cavity
Prenotochordal cells come from where?
Hypoblast
The notochordal cells detach from where to form the notochord?
Endoderm
Remnants of notochord become what part of the vertebra?
Nucleus pulposus
Where does the amniotic cavity connect with yolk sac?
The primitive pit and the neurenteric canal