Erythrocytes (red blood cells)

-Diameter

-Life span

-# of cells/L of blood

-Shape,  nucleus type

-cytoplasm

-functions

- 7-10 um

-120 days

- 5x10¹² (males), 4.5x10¹² (females)

- biconcave disc, anucleate

-pink (Hb), halo in center

** transports Hb that binds O2 and CO2

Platelet (thrombocytes)

-Diameter

-Life span

-# of cells/L of blood

-Shape,  nucleus type

-cytoplasm

-functions

-2-4 um

- 10 days

- 150-400 x 10⁹

-oval biconvex disc, anucleate

- pale blue, central dark granulomere, peripheral less dense hyalomere

** hemostasis, promotes blood clotting, plugs endotheial damage

Neutrophil

-Diameter

-differential count

- nucleus

- cytoplasm

- function

- 9-12 um

- 60-70%

- segmented, 3-5 lobes, densely stained

- pale, linkely granular, evenly dispersed specific granules

** phagocytosis bacteria

increase in number in acute bacterial infections

Eosinophil

-Diameter

-differential count

- nucleus

- cytoplasm

- function

-12-15 um

- 1-4%

- bilobed, clumped chromatin pattern, densely stained

- large homogeneous and granules athat are course, highly refractile

** phagocytoses antigen-antibody complexes and parasites

Basophil

-Diameter

-differential count

- nucleus

- cytoplasm

- function

- 10-14 um

- 0-1%

- bilobed, segmented

-large blue specific granules, stain with basic dyes, often obscure nucleus

**anticoagulation, increases vascular permeability

Monocytes

-Diameter

-differential count

- nucleus

- cytoplasm

- function

-12-20 um

-3-10%

- indented, kidney shaped, lightly stained

- agranular, pale blue cytoplasm with lysosomes

** motile, gives rise to macrophages

Lymphocyte

-Diameter

-differential count

- nucleus

- cytoplasm

- function

- small: 6-10 um

medium-large: 11-16 um

- 20-40%

- small, round or slightly indented, darkly stained

- agranular, faintly basophilic, blue-gray

** acts in humoral (B cell) and cellular (T cell) immunity