Khan Academy Static

Muscles never sleep (literally). If you have ever taken a breath, you have benefited from the work of the diaphragm, which contracts to create an area of low pressure within your thoracic cavity, allowing air in. How exactly are some weightlifters able to support 717 lbs without breaking anything more than a little sweat? Fun fact: the largest muscle in your body is the gluteus maximus (that’s your butt) while the smallest skeletal muscle is the stapedius (it stabilizes the smallest bone, the stapes, which is in your middle ear).

10808_Autonomic_vs_somatic_nervous_system.html

10800_Role_of_the_sarcoplasmic_reticulum_in_muscle_cells.html

10801_Anatomy_of_a_skeletal_muscle_cell.html

10803_Motor_neurons.html

10809_Thermoregulation_by_muscles.html

10805_Type_1_and_type_2_muscle_fibers.html

10802_Three_types_of_muscle.html

10799_How_tropomyosin_and_troponin_regulate_muscle_contraction.html

10806_Calcium_puts_myosin_to_work.html

10798_Myosin_and_actin.html

10804_Neuromuscular_junction_motor_end_plate.html

10807_Muscle_innervation.html