1. Muscular System

2. Latin Root Words Latin Root WordDefinition SarcoMuscle MyoMuscle Epi-Above Peri-Around Endo-Inside -UmStructure FasciaBand MerePart ReticulumNet -aseEnzyme Synergyworking together AgonistPrime mover AntagonistWorking against

3. Tissue Review Primary purpose of Muscles? Movement

4. Tissue Review Cardiac Skeletal Smooth

5. The Muscles: Each muscle is an organ comprised of skeletal _________tissue, several ___________ tissue coverings, _______ tissue to cause it to contract, and ______ to nourish it. Muscle Connective NervousBlood Example Question: Muscles are organs that are composed of what types of tissues?

6. Connective Tissue Coverings: A muscle has several dense connective coverings. Layers of dense connective tissue, called ________, surround and separate each muscle. This connective tissue extends beyond the ends of the muscle and gives rise to cord like ________ that are fused to the periosteum of bones. Sometimes muscles are connected to each other by broad sheets of connective tissue called ____________________ Fascia Tendon aponeurosis

7. Aponeurosis

10. Connective Tissue Coverings: Under the outer layer another layer of connective tissue around each whole muscle is called the ___________________________ The ____________________________ surrounds individual bundles of muscle fibers called ___________ within each muscle Each muscles cell (fiber) is covered by a connective tissue layer called _______________________ epimysium (above the muscle) Perimysium (around the muscle) Endomysium (inside the muscle) Fascicles

11. Bone Tendon Epimysium Fascicle Perimysium Endomysium Muscle Fiber Perimysium Epimysium Perimysium Endomysium Fascicle

13. Skeletal Muscle Fibers Structure The muscle fiber membrane is called the ___________________ which contains the cytoplasm called _________________. Within the sarcoplasm are many parallel ____________________composed of smaller filaments called ____________________. These myofilaments are actually two types of filaments, a thicker filament composed of the protein _____________ and a thinner mostly made of the protein _____________. Sarcolemma sarcoplasm Myofibrils Thick and Thin Filaments myosin actin

15. Bone Tendon Fascia Epimysium Perimysium Endomysium Fascicle Nerve B.V. Muscle Fiber Sarcolemma Nucleus Sarcoplasmic Reticulum Myofibril Myosin (Thick) Actin (Thin)

17. Skeletal Muscle Fibers Structure The dark stripes are called ___ bands and the light bands are called ______________. A _______________ is defined as a unit extending from one __________ line to the next (center of the light band.) A I bands Sarcomere Z line

19. Skeletal Muscle Fiber Sarcoplasmic Reticulum Sarcomere Myosin Actin Myofirbril A Band I Band A Band I Band Z Line H zone M Linke

20. Z line A Band H Zone I Band M line

21. Sarcomere Anatomy I Band = Light, Thin Actin Filaments only A Band = Dark, Thick Myosin Filaments and Thin Actin Filaments Z line = I band (actin filaments) connect to Z line H Zone = Thick Myosin Filaments only M Line = Thickening in the H zone

22. Muscle Identification Use the text book to label the muscles in your packet. You will need to begin memorizing these muscles. Page 188 - 199