DETERMINATION OF THE NORMAL RATE AND DURATIOIS OF MITOSIS IN HUMAN EPIDERMIS*
Louis B. Fisher
Abstract
Louis B. Fisher
Abstract
SUMMARY. A standardized method has been evolved for determining the mitotic rate of epidermis for a period of 5 hr. This gives consistent results for the epidermis of both adult men and women. The mitotic rate of normal epidermis from adult men and women measured over a 5 hr. period (using colcemid) is 1·44 and 1·17 mitoses per 1000 viable epidermal cells, respectively. The duration of mitosis of normal epidermis is approximately 90 min.
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SUMMARY. A standardized method has been evolved for determining the mitotic rate of epidermis for a period of 5 hr. This gives consistent results for the epidermis of both adult men and women. The mitotic rate of normal epidermis from adult men and women measured over a 5 hr. period (using colcemid) is 1·44 and 1·17 mitoses per 1000 viable epidermal cells, respectively. The duration of mitosis of normal epidermis is approximately 90 min.
Key concepts: Mitosis, Epidermis (zoology), Biology, Cell biology, Anatomy