1. Normal Blood Cell Morphology

2.  Safety precautions  Quality assessment  Use oil immersion

3.  Examine feathered edge

4.  Relative cell size  Nuclear characteristics  Cytoplasmic characteristics

5.  Most numerous blood cell  Nonnucleated  Central area of pallor  6–8 µm  Stain pink-tan

6.  Smallest blood “cell”  Cytoplasmic fragment Derived from megakaryocyte Contains granules

7.  Largest of blood cells  Five basic types Granulocytes  Neutrophil, eosinophil, basophil Lymphocytes Monocytes

9.  Most numerous WBC  Segmented nucleus  Neutral-staining (pink-lilac) granules  Band cell is immature form

10.  Red-orange granules  Nucleus has two to three lobes  Present in low numbers

11.  Only seen occasionally  Blue-black granules

12.  Smallest WBC  Round to oval nucleus  Sky-blue cytoplasm  Occasional granules

13. Lymphocyte

14.  Largest WBC  Horseshoe-shaped or folded nucleus  Gray-blue cytoplasm  Occasional vacuoles