Answer Happy

Please match the terms.
Ingression
Invagination
Elongation
Convergent Extension
Involution
cells elongate and pinch to form a blastopore in sea urchins and frogs in sea urchins, the mass of cells at the vegetal pole is pulled into a thin layer that lines the archenteron in sea urchins, mesenchyme cells attach to the newly formed archenteron and use filopodia to pull it through the blastocoel cells unadhere and move into the blastocoel to start gastrulation in sea urchins in frogs, cells in the animal pole divide, pushing other cells through the blastopore to form inner germ layers