Red blood cells are seen as biconcave disks. Why is this shape important for their function?
Shown in the following photo are red blood cells in a smear, small platelets (p) and a neutrophil with a multilobed nucleus. The drumstick like projection from the nucleus is called a "Barr Body" and represents the condensed X chromosome. This signifies that the blood was taken from a female
Monocytes are phagocytic and may have vacuoles in the cytoplasm. They also have a horseshoe shaped nucleus or, in immature monocytes, they may have an indented nucleus.
Lymphocytes are only slightly larger than red blood cells (small lymphocytes) and they have a relatively large nucleus:cytoplasm ratio. Note that the lymphocyte in the above photo has only a thin rim of light purple cytoplasm around the dense nucleus.
More blood cell types:
URL Address: http://microanatomy.net/blood/
Gwen V. Childs, Ph.D., FAAA
Department of Neurobiology and Developmental Sciences
University of Arkansas for Medical Sciences
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