Figure 369 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Erythrocytes in a longitudinal section through a capillary from the myocardium of a cat. In the upper cell, the hemoglobin has formed a large single crystal, and the surrounding cytoplasm is pale. In the lower erythrocyte, hemoglobin appears to be normally distributed, and the cytoplasmic matrix appears uniform. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.