MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of a section through a human ovary, showing several ovarian follicles. The outer section of the ovary, the cortex, contains sacs or follicles which house eggs at various stages of development, from the most rudimentary oocyte to the single mature egg cell, or ovum, released at ovulation. In this micrograph, the follicles are seen nestling in the ovary, separated by connective tissue. Each month about 20 primitive follicles start the process of maturation, but only one follicle develops to the point where a mature egg is shed. The remainder degenerate. Magnification: x800 at 35mm size. Blue tint (of Kage's, not ours). Ref: MICROCOSMOS, fig.
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