57.9 MB (5.6 MB compressed)
4500 x 4500 pixels
38.1 x 38.1 cm ⏐ 15.0 x 15.0 in (300dpi)
R. BICK, B. POINDEXTER, UT MEDICAL SCHOOL / SCIENCE PHOTO LIBRARY R. BICK, B. POINDEXTER, UT MEDICAL SCHOOL / SCIENCE PHOTO LIBRARY
Skeletal muscle. Coloured transmission electron micrograph (TEM) of a cross section through human skeletal (striated) muscle. Blocks of muscle (red) are surrounded by connective tissue. Filaments of the proteins actin and myosin (tiny dots) form the muscle myofibrils, which are enclosed by sarcoplasmic reticulum. The actin and myosin filaments can slide over one another, allowing the muscle to contract. Mitochondria (brown ovals) provide the large amounts of energy required by skeletal muscle. Skeletal muscle is under the conscious control of the brain.
Model release not required. Property release not required.