Muscular System part 1

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Author:
eli
ID:
141438
Filename:
Muscular System part 1
Updated:
2012-03-20 17:14:56
Tags:
anatomy
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Description:
Unit 2 review
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  1. Muscle organ
    muscle fibers(cells) + C.T. +nervous tissue + epithelial tissue
  2. Muscle Characteristics
    1.) Excitability-responds to external stimuli

    2.)Contractility-actively shortens along longitudinal axis.

    3.)Extensibility-can stretch beyond original length w/o tearing.

    4.Elasticity-returns to original size.
  3. five general facts about the muscle
    • 1.) Latin for little mouse
    • 2.) 700 muscles total
    • 3.) 40-50% of total body weight
    • 4.) Elongated protein packed cells
    • 5.)Contract on command
  4. Muscle function
    1.) Chemical Energy for the cell is ATP

    • 2.) Mechanical Energy allows us to:
    • a. produce skeletal and skin movement
    • b. maintain posture,position and joints
    • c. support soft tissue
    • d. regulate incoming/outgoing materialin tract
    • e. maintain body temp.
  5. Smooth and Cardiac muscle tissue
    • smooth-hollow organs and tubes
    • cardiac-heart
  6. Skeletal(somatic) muscle
    • 1.) striations
    • 2.) cylindrical-fibers
    • 3.) multiple peripheral nuclei
    • 4.) voluntary control
    • 5.) cannot divide
    • 6.) fatigue over time
    • 7.) attached to skeleton/skin

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