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2.26.18.docx - Introduction to the Skeletal System Levels...

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Introduction to the Skeletal System Levels of Organization Gross-means what you can see with the naked eye. Epimysium is what encases the entire muscle (ex the biceps) Muscle bundle/ fascicle: many of these Each fascicle is covered by its own connective tissue called the perimysium Muscle fibers are covered by the endomysium Myo or sarco are associated with muscle (you can know that you are referring to muscle structure with these words). Skeletal Muscle: Organization - Actin and Myosin the two proteins that make up muscle fiber. - Sometimes called the myofilaments - They are organized next to each other in what is called a sarcomere - The blue lines are the sarcoplasm reticulum. This is where calcium is stored within sacs. - There are three tubes called the triads, they are in the same pattern - Outside is call terminal cisternae and connect with the sarcoplasm reticulum - Pink tube down the middle is transverse tubule - This tubular system is important for contraction and its associated with action potential.
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