Gasrulation Definition and Different Morphogenetic Movements Flashcards
it pertains to the movements that generate to form of the organism
Gastrulation
it is defined as the morphogenetic movements of cells
Gastrulation
gastrulation refers to the rearrangement and the formation of the three germ layers which are:
ecto, meso, endo
true or false
Gastrulation happens after fertilization, referred to as radical rearrangement
True
why is gastrulation referred to as radical rearrangement?
cells are placed in new neighborhoods giving them a chance to interact with one another in very specific ways influencing each other’s development faith
(it is said as followed by all organism in a species)
it refers to the movement of sheets of cells which intend to cover other cells
-animal poles
-tends to cover the whole embryo
Epiboly
infolding of layers of cells
invagination
- creeps along the inner layer
- inward movement
- inturning of cells
- movement of cells inward
Involution
-inward movement of cells as individuals
-movement of cells individually
-move out individually
Ingression
- cells intercalate narrowing the tissue and moving it forward
- whole mess of cells that will form a straight line
- intercalate with each other to form one long layer
Convergent extension
it causes the elongation or stretching of a structure
- it gives the embryo and elongated shape
Convergent extension
refers to the separation of cells as parallel sheets
- in megalecithal eggs
- to create the epiblast and hypoblast
Delamination
true or false
hypoblast is formed from the lower cells to form a new upper cells through delamination
True
it refers to the movement of cells by sheets or layers separating the blastocoel, and forms a blastodisc
Delamination
