60.2 MB (60.0 MB compressed)
5616 x 3744 pixels
47.5 x 31.8 cm ⏐ 18.7 x 12.5 in (300dpi)
DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Graafian follicle. Light micrograph of a section through a mature Graafian follicle from a mammalian ovary. This contains the secondary oocyte (round object at centre), which becomes an ovum (egg cell) when it is released into the oviduct (fallopian tube). The secondary oocyte is surrounded by cells (corona radiata) within the cavity of the follicle, which is filled with follicular fluid. The follicle wall (outer area) consists of an inner layer (membrana granulosa) and an outer fibrous layer. Magnification: x103 when printed at 10 centimetres across.
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