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The Muscular System

The Muscular System. There are four characteristics associated with muscle tissue: Excitability Contractility Extensibility Elasticity. - Tissue can receive & respond to stimulation. - Tissue can shorten & thicken. - Tissue can lengthen.

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The Muscular System

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  1. The Muscular System

  2. There are four characteristics associated with muscle tissue: • Excitability • Contractility • Extensibility • Elasticity - Tissue can receive & respond to stimulation - Tissue can shorten & thicken - Tissue can lengthen - After contracting or lengthening, tissue always wants to return to its resting state

  3. The characteristics of muscle tissue enable it to perform some important functions, including: • Movement – both voluntary & involuntary • Maintaining posture • Supporting soft tissues within body cavities • Maintaining body temperature

  4. Types of muscle tissue: • Cardiac – myocardium of the heart (involuntary) • Skeletal – attached to bone (voluntary) • Smooth (Visceral) – organs/blood vessels (involuntary)

  5. Anatomy of skeletal muscles epimysium tendon perimysium Muscle Fascicle Surrounded byperimysium endomysium Skeletal muscle Skeletal muscle fiber (cell) Surrounded by epimysium Surrounded by endomysium Play IP Anatomy of Skeletal muscles (IP p. 4-6)

  6. How many muscles are in the human body???? • approximately 850 • 650 are • skeletal muscles • 200 make up • cardiac and smooth

  7. Skeletal muscle movements Flexion/extension; Abduction/adduction; Inversion/eversion Rotation – left/right; internal(medial)/external(lateral) pronation/supination; Elevation/depression Protraction/retraction; Dorsiflexion/plantarflexion

  8. An Overview of the Major Skeletal Muscles Figure 7-11(a)

  9. An Overview of the Major Skeletal Muscles Figure 7-11(b)

  10. Anatomy of the Muscular System • Muscles of the Head and Neck Figure 7-12(a)

  11. Anatomy of the Muscular System • Muscles of the Head and Neck Figure 7-12(b)

  12. Anatomy of the Muscular System • Oblique and Rectus Muscles and the Diaphragm Figure 7-15(a)

  13. Anatomy of the Muscular System • Muscles of the Shoulder Figure 7-17(a)

  14. Anatomy of the Muscular System • Muscles of the Shoulder Figure 7-17(b)

  15. Anatomy of the Muscular System • Muscles that Move the Arm Figure 7-18(a)

  16. Anatomy of the Muscular System • Muscles that Move the Arm Figure 7-18(b)

  17. Anatomy of the Muscular System • Muscles That Move the Forearm and Wrist Figure 7-19

  18. Anatomy of the Muscular System • Muscles That Move the Thigh Figure 7-20(a)

  19. Anatomy of the Muscular System • Muscles That Move the Leg Figure 7-21

  20. Anatomy of the Muscular System • Muscles That Move the Foot and Toes Figure 7-22(a)

  21. Anatomy of the Muscular System • Muscles That Move the Foot and Toes Figure 7-22(b)

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