the first , within 7-10 days after the hatching , to be differentiated are the acidophilic cells of mesoadenohypophysis , then , on the 10-15th day , the acidophilic cells of proadenohypophysis and on the 20-25th day the basophilic cells of mesoadenohypophysis which perform the thyrotropic function and the cells of metadenohypophysis .
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differentiated
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the cells