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The cellular dynamics of certain epithelial tissues from the oral cavity were compared with those from the ear, in rats aged between ten and seven hundred and fifty one days, using autoradiography. The results indicated that the proliferative activity of these tissues decreased in the initial stages of life, thereafter to remain virtually constant; the tissues from the oral cavity proliferating considerably faster than those from the ear.
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C.L.B. Lavelle (1968) studied this question.
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