LM of a mature human ovum

LM of a mature human ovum

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Credit: EDELMANN/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a single, mature human ovum (egg), showing the central oocyte surrounded by a layer of follicular cells, the corona radiata. Mature human ova develop in the ovaries from primordial follicles which, although formed between the 4th & 7th month of foetal development, remain dormant until sexual maturity. In each ovarian cycle up to 20 primordial follicle are activated to form primary follicles; normally only one will reach full maturity (a graafian follicle) and be released at ovulation, when the mature follice ruptures and releases the ovum to be received into the fallopian tube.

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Keywords: anatomy, corona radiata, egg, female reproductive system, human body, light micrograph, ovum, reproduction

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