Outside the nucleus is the centrosome, or, more commonly, two of them lying close together.
It is true that we may not yet know the source of this centrosome.
The centrosome, with its fibres, brings about the separation of these two halves.
The centrosome is too problematical as yet for much comment.
If this is true, the centrosome of the zygote nucleus must be entirely derived from that of the male pronucleus.
In addition to the nucleus and cytoplasm, a third body, the “centrosome,” has often been considered as a constant cell-structure.
Does the magic of the centrosome correspond in some sense to the glamour, so well known in human affairs?
In the later stages the centrosome is clearly seen at the base of the head (fig. 203).
When a cell is about to divide, an organ of recent discovery, termed the centrosome, comes into play.
In this way the centrosome approaches the female pronucleus, and thus finally the two nucleii are brought into close proximity.
centrosome cen·tro·some (sěn'trə-sōm')
A small region of cytoplasm adjacent to the nucleus that contains the centrioles and serves to organize microtubules. Also called cytocentrum, microcentrum.