Final answer:
Neutrophils make up 50-70% of leukocytes, have a diameter of 10-12 µm, and their granules stain with neutral dyes. Mature neutrophils are called 'polys,' and immature ones are 'bands.' They are significant for their role in the nonspecific immune response.
Step-by-step explanation:
Neutrophils are a critical component of the leukocyte population in the blood, accounting for 50-70 percent of the total leukocyte count. These cells are significantly larger than erythrocytes, being 10-12 µm in diameter and possessing a nucleus that may have two to five lobes. The lobe number tends to increase with the cell's age, and cells with multiple lobes are recognized as polymorphonuclear leukocytes or "polys." On the other hand, young, immature neutrophils that have not fully developed lobes are called "bands." Neutrophils are also characterized by the fine and lilac-colored granules that show up clearly with neutral dyes. They serve a vital role in providing a rapid and nonspecific defense against pathogens.