Final answer:
Granular and agranular refer to the two main categories of white blood cells, with agranular leukocytes including monocytes and lymphocytes, and granular leukocytes including neutrophils, eosinophils, and basophils.
Step-by-step explanation:
Granular and agranular are the two major types of white blood cells. The agranular leukocytes have fewer and less visible granules in their cytoplasm compared to granular leukocytes. Agranular leukocytes include monocytes and lymphocytes, with monocytes maturing into macrophages that have phagocytic capabilities, and lymphocytes originating from the lymphoid stem cell line. On the other hand, granular leukocytes, which typically have a lobed nucleus, include neutrophils, eosinophils, and basophils. They are produced in the red bone marrow and characterized by the type of stain that best highlights their granules.