Blood Cells/Typing

Erythrocyte

Erythrocyte

Erythrocyte

Platelets

Platelets

Platelets

Monocytes

Monocytes

Monocytes

Lymphocytes

Lymphocytes

Lymphocytes

Eosinophils

Eosinophils

Eosinophils

Neutrophils

Neutrophils

Neutrophils

Basophils

Basophils

Basophils

Neutrophils

• Fine light-purple granules

• Nucleus single to five lobes (highly variable)

• Immature neutrophils, called bands, have a single C-shaped nucleus

• Mature neutrophils, called segs, have a lobes nucleus

• Often called polymorphonuclear leukocytes when older

Eosinophils

• Coarse reddish granules

• Nucleus usually bilobed

Basophils

• Coarse deep blue to almost black granules

• Nucleus often almost hidden by granules

Lymphocytes

• Slightly larger that RBC’s

• Thin rim of nearly clear cytoplasm

• Nearly round nucleus appears to fill most of cell in smaller lymphocytes

• Larger lymphocytes hard to distinguish from monocytes

Monocytes

• Largest WBC; 2-3X larger than RBCs

• Cytoplasm nearly clear 

• Nucleus round, kidney-shaped, oval, or lobed

Platelets

• Cell fragments

• Single to small clusters

Erythrocytes

• Lack nucleus (mature cell)

• Biconcave discs

• Thin centers appear almost hollow