Related Experiment Video
Updated: Jul 27, 2025

Visualizing Neuroblast Cytokinesis During C. elegans Embryogenesis
Published on: March 12, 2014
Cell Division Pattern during Gastrulation of the Ascidian, Halocynthia roretzi: (cell division
1Department of Zoology, Kyoto University, Kyoto 606, Japan.
Abstract:
With the aid of scanning electron microscopy, the spatial and temporal pattern of cell divisions during gastrulation of ascidian embryos was analysed and described up to the 306-cell stage. After the 64-cell stage asynchrony of cleavages became apparent, but the spatio-temporal cell-division pattern was highly invariant. The division pattern of cells in the animal hemisphere was regular, while that of cells in the vegetal hemisphere was complicated. The results obtained in the present study coincided with Conklin's description (1905) with only a few discrepancies. Gastrulation started around the 110-cell stage and a late gastrula consisted of about 300 cells. In addition, the cell lineage of the neural tube was described.
Related Concept Videos
Cleavage and Blastulation
Gastrulation
Determining the Plane of Cell Division
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
Zygotic Development And Stem Cell Formation
The Contractile Ring
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
Distribution of Cytoplasmic Content
Distribution of cytoplasmic determinants
The cytoplasm contains various organelles, as well as salts, proteins, and water. The distribution of...

