7. Xenopus GASTRULATION
Due to the contraction of bottle cells, dorsal lip of the blastopore forms. From the early "frown" blastopore continues to develop until blastopore can be observed as an intact circular ring of involuting cells. Due to convergent extension blastopore get close at the yolk plug and thus elongation of embryo along the anterior-posterior axis occur.
At the exterior edge of the blastula, a small group of cells change their shape and get narrow, this is called apical constriction, generates a local invagination, which begins to roll a sheet of cells towards the interior and drives more interior cells upwards. Due to their shape, the constricted cells are called bottle cells.
- CLEAVAGE AND AXIS FORMATION IN C. ELEGANS
- ANTERIOR POSTERIOR AXIS DIFFERENTIATION IN DROSOPHILA
- SEA URCHIN GASTRULATION
- XENOPUS GASTRULATION
- MATING SWITCH
- MORPHOGENESIS AND ORGANOGENESIS IN AMINALS
- CELL AGGREGATION AND DIFFERENTIATION IN DICTYOSTELIUM
- LIMB DEVELOPMENT AND REGENERATION
- DEVELOPMENT OF NEURONS
- LARVAE FORMATION
- SEX DETERMINATION
- EYE LENS INDUCTION
- THE ABC MODEL OF FLOWER DEVELOPMENT