Development of the optic nerve of the rat - Investigative ...

V ultima 14
Number 10
Rat optic nerve 739
Fig. 9. A portion of astrocytes in a 16-day-old fetus. Axons are divided into groups. The
cytoplasm of the astrocyte contains rough endoplasmic reticulum, microtubules, and filaments.
x32,500. Insert shows junctions between the cell processes of the differentiating a-stroeytes,
17-day-old fetus. x48,400.
Fig. 10. Optic stalk of a 15-day-old fetus. A, hyperchromatic cells appear in the cluster of
the stalk cell in the retrobulbar zone. Epoxy section, toludine blue. x480. 8, electron micrograph
of the hyperchromatic cell. The cytoplasm contains abundant ribosomes. x 13,000.