White Blood Cells

Blood Histology

Neurophil

Granulocyte

Multi-lobe nuclei

FUNCTION: phagocytosis

% of WBC: 60-70%

Eosinophil

Granulocyte

bi-lobe nuclei & orange granules in cytoplasm

FUNCTION: destruction of parasitic worms

% of WBC: 1-5%

Basophil

Granulocyte

S-shaped nucleus & dark granules

FUNCTION: immune/allergy response

% of WBC: 0.5-1%

Lymphocyte

Agranulocyte

small, round to oval nucleus that fills up most of the cell

FUNCTION: humoral immunity (B-cells) & cell-mediated immunity (T-cells)

% of WBC: 20-40%

Monocyte

Agranulocyte

largest cells with kidney-shaped/indented nucleus

FUNCTION: precursor for macrophages, phagocytosis, and cytokine production

% of WBC: 2-10%