Which component of the leukocyte classification is considered a granulocyte?

Neutrophils are classified as granulocytes due to the presence of granules in their cytoplasm, which play a crucial role in the immune response. These granules contain enzymes and antimicrobial substances that help in the defense against pathogens, particularly bacteria and fungi. Neutrophils are a type of white blood cell that is part of the innate immune system, and they are typically the first responders to sites of infection or injury.

In contrast, the other cell types mentioned do not have this granular appearance. Lymphocytes and T cells are types of agranulocytes, which means they do not contain visible granules in their cytoplasm and are involved more in the adaptive immune response. Monocytes are also agranulocytes and play a role in phagocytosis and differentiation into macrophages and dendritic cells. Thus, identifying neutrophils as granulocytes is critical in understanding their function and role within the overall immune response system.