Striated cardiac myocytes showing yellow pigment lipofuscin granules near the central nucleus. The myocytes are joined by intercalated disks. Light micrograph. H&E stain.

aging anatomy cardiac cell fiber fibre heart histology intercalated disks light microscope lipofuscin lm micrograph microscope microscopic microscopy muscle myocardiocyte myocardium myocyte myofibril skeletal striated tissue