PG 62 Func. of leukocytes

What are the five types of leukocytes?

neutrophils, eosinophils, basophils, lymphocytes, and monocytes

what are the granulocytes?

neutrophils, eosinophils, and basophils

what are agranulocytes?

lymphocytes and monocytes

Neutrophils

description - light purple color, multi lobed, most abundant leukocyte

func. - phagocytize microbes such as bacteria at local wound sites, bacterial infections - acute infections

% of leukocytes - 70%

eosinophils

description - orange- red with bluish colored bi-lobed nucleus

func. - phagocytize parasitic infections like worms and allergic infections

% of leukocytes - 3%

Basophils

description - dark blue, very rare, bi-lobed

func. migrate to injured tissue and release histamine and heparin; similar to mast cells and produce similar inflammatory response; allergic reactions

% of leukocytes - <1%

lymphocytes

description - large blue - purple nucleus and surrounded by a pale blue cytoplasm

func. - main cells in lymph nodes; immune response to infection; t cells and b cells; respond to bacterial and viral infections, autoimmune diseases, cancer

% of leukocytes - 20-30%

monocytes

description - twice the size of erythrocytes; purple blue horseshoe shaped nucleus

func. - migrates outside of bloodstream and becomes macrophages (very large phagocytic cells); bacterial (or viral) infections

% of leukocytes - 2-8%