Khan Academy Static

Without muscles, we wouldn't be able to do much of anything. This tutorial explores what muscle cells are and how they contract to let us move our bodies.

9829_Anatomy_of_a_skeletal_muscle_fiber.html

9826_Myosin_and_actin.html

9828_Role_of_the_sarcoplasmic_reticulum_in_muscle_cells.html

9827_How_tropomyosin_and_troponin_regulate_muscle_contraction.html