Final answer:
Eosinophils are the type of white blood cells that have large numbers of granules in their cytoplasm, part of the granulocytes group along with neutrophils and basophils.
Step-by-step explanation:
The white blood cell (WBC) type that has large numbers of granules in its cytoplasm is the Eosinophil. Eosinophils, along with neutrophils and basophils, are part of a group known as granulocytes, which are characterized by granular inclusions within the cytoplasm and a lobed nucleus. These granulocytes are typically first-responders during injury or infection. In particular, an eosinophil's granules are slightly larger and stain reddish-orange, and the nucleus usually has two to three lobes.