Attached is the picture regarding the question.
From left to right.
The first picture is a basophil. It is a granulocyte. It has deep blue cytoplasmic granules. Basophils function to release histamine and heparin. Basophils are elevated usually in conditions involving allergic reactions. It is also the least abundant WBC. Basophils are similar in characteristic with mast cells except mast cells are embedded in tissues and basophils are circulating in bloodstream.
The second picture is an eosinophil. Eosinophils are also granulocytes. It has deep red cytoplasmic granules. Eosinophils function to combat allergic reactions but mostly elevated in cases of parasitic worm infections. The deep red granules contain enzymes that are very effective in combating parasitic worm infections.
The third picture is a lymphocyte. It is an agranulocyte as it has no cytoplasmic granules. The characteristic morphology of lymphocytes is a spherical nucleus with small rim of cytoplasm. Lymphocytes can be classified as T and B cells, depending on the function. T cells can be cytotoxic or helper. B cells can differentiate into plasma cells to produce antibodies. Lymphocytes are considered as a clinical sign of chronic inflammation and/or viral infections.
The fourth picture is a monocyte. Monocytes are also agranulocytes. These monocytes respond to tissue inflammation through chemotaxis and become macrophages in tissues. Monocytes are the largest WBC. The main function of macrophages is for phagocytosis of foreign bodies, bacteria, and dead tissues.
The fifth picture is a neutrophil. It is a granulocyte. Neutrophils have fine light purple cytoplasmic granules called azurophilic granules. Neutrophils are classified as the the most abundant WBC. Neutrophils are also called as polymorphonuclear cells because of the multilobed appearance of the nucleus. Neutrophils are considered as a clinical sign of acute inflammation and/or bacterial infections.
