Please explain epiboly and emboly types of gastrulation movements.
Dear student
The blastula passes into the stage called gastrula by the process—Gastrulation.
The cell movement is of following types :
Epiboly: It involves the extension along the anterior- posterior axis and peripheral divergence takes place.
The blastula passes into the stage called gastrula by the process—Gastrulation.
The cell movement is of following types :
Epiboly: It involves the extension along the anterior- posterior axis and peripheral divergence takes place.
Emboly: The inward movement of cells is called Emboly. It is classified into different types depending on the behaviour of migrating cells.
These are:
These are:
(i) Invagination: It denotes the infolding of a layer of cells to form a cavity encircled by infolded cells.
(ii) Involution: It implies the inward rotation of cells as seen in the gastrulation of amphibian and avian eggs.
(iii) Ingression : cell in this case moves inwards.
(iv) Delamination: This is a process of separation of a group of cells from others to form discrete cellular masses.
Regards
Regards