STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Ovarian tissue. Coloured scanning electron micrograph (SEM) of a section through the medulla of an ovary showing blood vessels (pink). The ovary stores a woman's eggs, releasing one each month at ovulation. The medulla is the central region of an organ, in the ovaries it is mainly composed of connective tissue and blood vessels and does not contain any eggs.
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