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Exploring the Muscular System: Functions, Types, and Microscopic Anatomy

Dive into the world of the muscular system, understanding its role in protection, movement, heat production, and more. Learn about muscle cells, types of muscles, microscopic anatomy, and the terminology related to muscle contractions. Explore the structure of muscles, the sarcomere, and the different connective tissue coverings that surround muscle fibers.

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Exploring the Muscular System: Functions, Types, and Microscopic Anatomy

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  1. MUSCULAR SYSTEM POWER POINT • I. Muscular System -Protection, movement, joints, heat,etc.. • Muscle cells are elongated so called muscle _____ • Contraction due to microfilaments • Myo, mys, sarco refer to: ________________ • 3 types of muscle • Skeletal-attach to bones by____, multinucleated. • ___________ and ___________

  2. 2. SmootH Muscle is _________, single nucleus, located in_______________,& no _______________ 3. CARDIAC MUSCLE Has __________, involves the ___________, vol or invol? II. Microscopic ANATOMY Sarcolema is the plasma membrane of a muscle fiber Sarcoplasmic reticulum-stores and releases Ca+

  3. Connective Tissue Coverings: Endomysium surrounds each muscle fiber Epimysium surrounds entire skel muscle Perimysium surrounds a bundle of fibers (fascicle)

  4. Muscles composed of myofibrils that have light bands (actin) and dark bands (myosin) The sarcomere has thick ______ and thin _____ filaments Myosin has heads that allow it to attach to actin. These form cross bridges with actin during contraction.

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