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Ovary (cat) (100X)

Microimage
Ovary from cat. Image copyright: University of Oslo, CC BY-NC-ND 4.0. (Tissue stain: PFD).

This is a 1 µm-thick section from plastic-embedded material and stained with para-phenylendiamine (PFD) and toluidine blue. It therefore looks differently from the human sections, which are stained with hematoxylin and eosin (H+E). PFD stains lipids dark brown. This means that accumulations of steroid hormones and their precursors are shown to advantage in this section. Toluidine blue stains mainly cell nuclei.

In this section you can identify the same structures as in section 9. Try to identify:

  • primordial follicles
  • secondary follicles with the oocyte
  • granulosa cells
  • theca cells
Published March 30th 2019, updated September 7th 2020.