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Chapter10MuscleTissueMarieb - Ch 10 Skeletal Muscle...

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1) Describe the distinguishing characteristics of the different muscle tissues 2) Discuss the organization of skeletal muscle 3) Explain the micro-anatomy of a skeletal muscle fiber 4) Describe the fascicle arrangement in different types of muscle 5) Review general muscle terminology Ch 10: Skeletal Muscle Tissue (Myology) main objectives: Developed by John Gallagher, MS, DVM
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Types of Muscle Tissue One of the 4 primary tissue types Skeletal = Striated = Voluntary 40 % of weight Cardiac (involuntary) Smooth (involuntary, nonstriated Made up of many tissue types. > 700 skeletal muscles Word roots: sarco myo Musculus = little mouse
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Function of Skeletal Muscles 1. Skeletal movement 2. Posture and body position 3. Support of soft tissues 4. Joint Stabilization 5. Guarding of entrances & exits 6. Maintenance of body temperature 7. Protection 8. Facial expression
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Gross to Microscopic Anatomy Each skeletal muscle cell (fiber) is wrapped by 3 layers of connective tissue.
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Epi-, Peri-, and Endomysium Are interwoven - Continuous with tendon, and eventually the periosteum Distinguish between: Tendon Aponeurosis Ligament Function: Protection Blood supply Innervation Epimysium = On top of the muscle Perimysium = Around a bundle of myofibers Endomysium = Surrounds each myofiber
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Nerve and Blood Supply Skeletal muscles are rich in nerves and blood vessels.
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