innate immunity cells

granulocytes

leukocytes with granules in their cytoplasm that are visible with a light microscope

granulocytes

mast cells

neutrophils

basophils

eosinophils

mast cells

release chemicals to activate inflammation

neutrophils

highly phagocytic; most active in early stages of infection

basophils

release histamine; work in allergic responses

eosinophils

phagocytic; toxic against parasites and helminths

agranulocytes

leukocytes with granules in their cytoplasm that are not visible with a light microscope

agranulocytes

monocytes

dendritic cells

lymphocytes

monocytes

mature into macrophages in tissues where they are phagocytic

dendritic cells

found in skin, mucous membranes, and thymus; phagocytic

lymphocytes

T cells, B cell, and NK cells; B and T cells play a role in adaptive immunity