Major Muscles of the Human Body anterior and posterior view
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Major Muscles of the Human Body anterior and posterior view

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Major Muscles of the Human Body anterior and posterior view

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1. Major Muscles of the Human Body ( anterior and posterior view)

2. Human Muscular System ?anterior view?

3. Human Muscular System ?posterior view?

4. Skeletal Muscles Long, thin, and striped (striated) Continuous control (voluntary) Tendons Attached to bone at the periostium multinucleated

5. Smooth Muscle Fibers are organized Found inside the body Works automatically (can?t control your smooth muscle) Necessary for survival

6. Cardiac Muscle Only in heart Contain many mitochondria By age 70 heart contracts 2.5 billion times (assume resting heart beat). involuntary

7. Muscular Disorders Muscle ?pull? or ?strain? Tearing a muscle fiber(s), followed by bleeding or swelling of muscle Muscle ?cramp? Prolonged contraction of muscle, ion imbalance

8. Cont. Tendonitis Swelling of the tendons due to sharp twist or pull, over use Muscular Dystrophy Inherited disease in which muscle cells break down, gradual weakening of muscles, lose ability to contract

9. Quadriceps muscle (rectus femoris)

10. Muscle Terms Tendon Long connective tissue cord Actin and myosin Muscle proteins Origin Attachment to stationary part of bone Insertion Attachment to moveable part of bone Flexion Movement that reduces a joint angle Extension A movement that increases a joint angle

11. Movements of the body Extension Flexion

12. Muscle Belly to Sarcomere Muscle Belly Bundle of muscle fibers Muscle Fiber (cell) Bundle of myofibrils Myofibril Made up of units called sarcomeres Sarcomere Made up of muscle proteins actin and myosin

13. Antagonistic muscle pairs (one contracts while the other relaxes)


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