Light micrograph of myocardium (heart muscle). The cardiomyocytes (heart muscle cells) form interconnecting strands with one another. Fine striations (thin lines) are present in the eosinophilic (pink) cytoplasm. The cardiomyocyte nuclei are seen as the blue-purple dots. Haematoxylin and eosin stained tissue section. Magnification: 200x when printed at 10cm.