Is the most numerous white blood cell

Lobulated with 2-5 nuclei

Contains azurophilic granules

Contains special particles

Chemotaxis and phagocytosis

The cell nucleus has an "eight" shape and has two lobes.

The cytoplasm contains thick eosinophilic granules-lysosomes, which contain histamine, arylsulfatase and four cationic proteins. There are rectangular crystals in the granules under the electron microscope.

Histamine decomposes histamine, arylsulfatase inactivates leukotrienes, and cationic proteins kill parasites, thereby inhibiting allergic reactions, killing parasites, and engulfing antigen-antibody complexes.

Minimum quantity

The nucleus is lobed, irregular, and mostly "S" shaped.

The cytoplasm contains blue-purple granules of varying sizes and uneven distribution. The granules contain: histamine, heparin, and leukotrienes.

Functions similarly to mast cells and participates in allergic reactions

The nucleus is large, round, and often shallowly concave

Chromatin is dense and rough

The cytoplasm is basophilic and may contain azurophilic granules. Under an electron microscope, the cytoplasm contains a large number of free ribosomes and lysosomes, rough endoplasmic reticulum, Golgi apparatus, mitochondria, etc.

Produced in bone marrow, lymphoid organs, lymphoid tissue

Participates in immunity and is the main immune cell

Can be divided into small, medium and large lymphocytes. Large lymphocytes do not exist in the blood.

largest cell in blood

The nucleus is kidney-shaped, horseshoe-shaped, and lightly colored

The cytoplasm contains azurophilic granules, is weakly basophilic, and is gray-blue.

Chemotaxis, metamorphic motility, differentiation into macrophages