Relative numbers of various types of cell in the rat adenohypophysis

The percentages in female rats of acidophil, basophil, and chromophobe cells in the central and peripheral portions of the anterior pituitary lobe, as well as in the portion adjacent to the posterior lobe were determined. It was shown that the number of chromophobe cells in the various portions ranged from 56.3 to 59.3%. The number of acidophils varied between 30.7 and 35.9%, and basophils from 6.6 to 9.9%. The basophil count was higher in the peripheral portion than in the portion adjacent to the posterior lobe; there were fewer acidophil cells in the peripheral than in the central portion or in the portion adjacent to the posterior lobe.