This slide shows a basophil, the rarest of the leucocytes with a typical frequency of less than 1% of the total WBC count.  Note that the nucleus (usually  two-lobed) is rather indistinct being hidden by large purple or purplish-black cytoplasmic granules.  It is not unusual to fail to encounter basophils in differential white blood cell counts.  

This site was last modified May 10, 2002.    NOTE: These pages are best viewed at a screen size of 800 X 600 pixels.

The address of A/P Lab is:  http://bioweb.uwlax.edu/aplab/      Direct comments or questions to gillis.rick@uwlax.edu