The most numerous white blood cells

The nucleus is darkly colored and is rod-shaped or lobed with 2 to 5 leaves, and the leaves are connected by chromatin filaments. The cytoplasm is light pink and contains many small lavender granules, which can be divided into two types: special granules and azurophilic granules. Special particles account for 80%, containing phagocytosin and lysozyme;

The more lobed the nucleus, the more senescent the cell. When severe bacterial infection occurs in the body, the percentage of cells with nuclei in 1 to 2 lobes increases and the nuclei shift to the left; The number of cells in the 4th to 5th lobe nuclei is increased, which is called rightward shift of the nucleus, indicating bone marrow hematopoietic dysfunction.

The nuclei are mostly bilobed, and the cytoplasm is filled with thick, evenly distributed red eosinophilic membrane granules.

Inhibit allergic reactions; the cationic proteins in it can kill parasites that enter the human body

The smallest number, the nucleus is segmented or irregular, and the cytoplasm is filled with basophilic granules of varying sizes and uneven distribution. The Reiter stain shows blue-purple color, which often covers the nucleus and makes its boundary unclear.

Contains heparin, histamine, eosinophil chemoattractant, etc., and the cytoplasm also contains leukotrienes. Basophils have the same function as mast cells and can initiate inflammatory responses in the body and are also involved in collective allergic reactions.

The lymphocytes in the blood are mainly white blood cells, with a small amount of medium lymphocytes. Large lymphocytes are mainly distributed in lymph nodes, spleen and other lymphoid organs and lymphoid tissues.

The nuclei of small lymphocytes are round, often with shallow concavities on one side, and the chromatin is dense, thick, and deeply stained. There is very little cytoplasm, with a nucleocytoplasmic ratio of 9:1. Only a narrow band is formed around the nucleus, which is basophilic and stained blue.

Thymus-dependent lymphocytes (T cells)

Bone marrow-dependent lymphocytes (B cells)

Natural killer cells (NK cells)

It is the largest white blood cell. The nucleus can be kidney-shaped, round, horseshoe-shaped or twisted and folded irregularly. The chromatin is finely meshed and lightly colored. The cytoplasm is rich, weakly basophilic and often stained gray-blue. , containing many tiny azurophilic particles

Monocytes have obvious chemotaxis, active deformation movement ability and powerful phagocytosis function. They can also secrete a variety of biologically active substances and participate in the regulation of hematopoiesis.