1. Skeletal muscle sarcomere
Skeletal muscle sarcomere. A) Electron micrograph of human gastrocnemius muscle (× 13,500). The sarcomere, named bands, and lines are shown. (Used with permission from GM Walker and GR Schrodt.) B) Arrangement of thin (actin) and thick (myosin) filaments and the Z line in a relaxed skeletal muscle. C) Arrangement of thin and thick filaments and the Z-line in a contracted skeletal muscle. Note that the Z-lines come together as the thick and thin filaments slide next to each other during contraction. The thick and think filaments do not change in size.
Source: Excitable Tissue: Muscle, Ganong’s Review of Medical Physiology, 25e
Citation: Barrett KE, Barman SM, Boitano S, Brooks HL. Ganong’s Review of Medical Physiology, 25e; 2016 Available at: Accessed: December 21, 2017
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