Final answer:
Neutrophils are called heterophils in some species due to the intense staining of their granules. They are granular leukocytes that are most numerous among white blood cells and stain with a neutral dye.
Step-by-step explanation:
In some species, neutrophils are called heterophils because of the intense staining of the granules. Neutrophils are a type of granular leukocyte, which are a category of white blood cells that contain granules in their cytoplasm. These granules are specialized for containing chemicals needed to fight off infections, such as bacteria. Neutrophils are characterized by their ability to stain with a neutral dye and are the most abundant type of leukocytes.