Plate 13.246 Ovary
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Rabbit, 10% formalin, H. & E., 162 x.
Germinal epithelium: Forms the surface layer of the ovary and consists of a specialized peritoneal mesothelium. Misnomer, since there is no convincing evidence that it is the source of germ cells.
Stroma: Connective tissue stroma, richly cellular and compact. Stromal cells are spindle-shaped with elongated nuclei. The ovarian follicles are scattered within the stroma.
Primordial follicle: Consists of an immature ovum surrounded by a single layer of low cuboidal epithelium.
Growing follicle: At the initiation of follicular growth, the follicle cells assume a cuboidal shape, divide, and become multilayered.
Zona pellucida: Thick layer surrounds the growing ovum. Rich in polysaccharides.
Oocyte: Immature ovum containing the somatic number (diploid) of chromosomes. Will undergo meiosis to produce mature ovum.
Nucleus: The nucleus of an oocyte is large and contains a prominent nucleolus.
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