Tubo neurale, vescicole e calice ottico dell'embrione di pollo nei loro meccanismi morfogenetici
The neural plate formation in chick embryo is due to a change in cell shape. The cubic cells (Plate I, fig. 1) become cylindrical (Plate II, fig. 3). Their adhesion increases and microtubules appear in the cytoplasm. The neural tube formation is due to the cells, which become bottle-shaped. These cells are linked at the surface of the neural plate by occludent junctions (Plate IV, fig. 8). The cells contract in the region where there are microfilaments between the junctions and expand at the opposite...