Cellular Components

A microscopic specimen of blood shows the presence of red blood cells (erythrocytes); white blood cells, including neutrophils, eosinophils, and lymphocytes; and platelets.

(From KS Saladin, Anatomy and Physiology, 1998, WCB McGraw-Hill, p. 662; with permission. © The McGraw-Hill Companies Inc./Dennis Strete, photographer)