A&P Lab 2 Part 4

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  1. what is the muscle that attaches to the inside of the lower ribs around their entire circumference?
  2. what is the function of this muscle?
  3. what is the nerve to this muscle and what are its nerve roots?
    phrenic nerve from C3, C4, C5
  4. why is it important to remember the origins of this nerve?
    injuries or irritation to the diaphragm may not cause pain at the bottom of the chest or the upper part of the abdomen; the pain may occur in the neck where the nerve roots are
  5. you are presented with three stab wounds to the abdomen. one is directly in the midline, one 2cm lateral to the midline, one lateral to the mid-clavicular line. what abdominal wall structures are penetrated in each case?
    midline- linea alba

    just off the midline- rectus sheath, rectus abdominis muscle

    past mid-clavicular line- external abdominal oblique, internal abdominal oblique, transversus abdominis
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A&P Lab 2 Part 4
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