Heart muscle, fluorescence micrograph
Fluorescence deconvolution micrograph of a section through heart tissue, showing actin fibres (green) and nitric oxide synthase enzymes (purple). Actin is part of the cytoskeleton. The cytoskeleton maintains the cell's shape, allows some cellular mobility and is involved in intracellular transport. Nitric oxide synthase helps to regulate blood flow to the heart., Photo by R. BICK, B. POINDEXTER, UT MEDICAL SCHOOL/SCIENCE PHOTO LIBRARY
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