Final answer:
The original classifications of anterior pituitary cells based on H&E staining patterns are acidophils, basophils, and chromophobes.
Step-by-step explanation:
The 3 classifications originally given to anterior pituitary cells with different H&E staining patterns were acidophils, basophils, and chromophobes. These terms describe how the cells react to the dyes: acidophils stain with acid dyes, basophils with basic dyes, and chromophobes have little or no affinity for either type of dye. It's important to note that these classifications are distinct from the granulocytes and agranulocytes of the immune system, which include neutrophils, eosinophils, and basophils (as part of the granulocytes) and lymphocytes and monocytes (as part of the agranulocytes).