The key difference between granular and agranular leukocytes is that granular leukocytes have granules in their cytoplasm, but agranular leukocytes lack granules in the cytoplasm.
Leukocytes or white blood cells are one of the main types of blood cells. They are spherical in shape and colourless compared to red blood cells. The number of WBCs in blood has a range of 7,000-10,000/mm3. There are five types of WBCs, which can be distinguished by their staining characters, size, and the shape of their nuclei. Based on the staining character, there are two types as granulocytes and agranulocytes.