Skeletal Muscle, Tem

Partially Contracted Striated Muscle Fiber. This Type Of Muscle Fiber Contains Two Types Of Myofilaments. The Pink Bands Which Are Anchored In The Dark Red Bands Contain Only Thin Filaments Of Actin. The Wide Red Bands Striated With White Contain Both Thin Filaments Actin And Thick Ones Myosin. The Movement Of Actin Filaments Against Myosin Filaments Produces Muscular Contraction. The Mitochondria Green Circles Supply The Energy Necessary For Muscle Contraction By Using The Oxygen And Glucose Carried In The Blood. The Glucose Can Also Be Stored As Glycogen Brown. Color Enhanced Tem Image 88,000X. (Photo By BSIP/UIG Via Getty Images)