In most healthy organs and tissues of the cells die, and to replace them come new formed by dividing the group of stem cells. In blood, for example, four months is replaced by the vast majority of red blood cells, which are replaced by "descendants of the" blood stem cell, located deep in the bone marrow. In the skin from the cell pool synthesized new melanocytes that produce the dark pigment, melanin, and if the stem cells die, then in mice, for example, black skin is white - new melanocytes instead spent his time not to take from.
09.04.2011. (12:05)
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Xeloda
In most healthy organs and tissues of the cells die, and to replace them come new formed by dividing the group of stem cells. In blood, for example, four months is replaced by the vast majority of red blood cells, which are replaced by "descendants of the" blood stem cell, located deep in the bone marrow. In the skin from the cell pool synthesized new melanocytes that produce the dark pigment, melanin, and if the stem cells die, then in mice, for example, black skin is white - new melanocytes instead spent his time not to take from.
09.04.2011. (12:05) - - - - - promjene spremljene- uredi komentar - obriši komentar - prijavi ovaj komentar kao spam - zabrani komentiranje autoru ovog komentara- učitavam...