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Biology Lesson 7.5

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Biology Lesson 7.5

  1. 1. 4 Functions:1. Produce skeletal movement2. Maintain posture and body position3. Guard the entrances and exits of the body4. Transport things through the body – blood and lymph
  2. 2. MUSCLE TERMSSTRIATED – STRIPED INAPPEARANCENON-STRIATED – NOTSTRIPED IN APPEARANCE
  3. 3. The Muscular SystemThree basic muscle types are found in the body
  4. 4. 1. Cardiac muscle  only in heart  Striated (striped)  involuntary  contracts over a long period of time
  5. 5. 2. Smooth muscle  found in organs  Non-striated  involuntary  slow, powerful contractions
  6. 6. 3. Skeletal muscle  striated  voluntary  multinucleated  quick, powerful contractions
  7. 7. Anatomy of a Skeletal muscle•made of specialized cellscalled muscle fibers thatcontract quickly andpowerfully.
  8. 8. Anatomy of a Skeletal muscle•made of specialized cells called muscle fibers that contract quickly and powerfully.•Each muscle has thousands tomillions of muscle fibersbundled together.
  9. 9. Anatomy of a Skeletal muscle•made of specialized cells called muscle fibers that contract quickly and powerfully.•Each muscle has thousands to millions of muscle fibers bundled together.•Muscles are attached to bones bytendons (dense regularconnective tissue).•Muscle itself is called the belly.
  10. 10. tendonbelly
  11. 11. Muscles of the body
  12. 12. 1 Frontals
  13. 13. 4 & 13 Sternocleidomastoid muscle
  14. 14. 2 Temporalis and Masseter 3
  15. 15. Trapezius 14
  16. 16. Intercostal
  17. 17. 6 Pectoralis major
  18. 18. Deltoids 5
  19. 19. Latissimusdorsi 16
  20. 20. Biceps brachii 7
  21. 21. 15 Triceps brachii
  22. 22. Rectus abdominus 9 External oblique 8
  23. 23. 17 Erector spinae
  24. 24. 18 Gluteus maximus
  25. 25. 10 Adductor longus
  26. 26. 12 Quadriceps femoris
  27. 27. 19 Hamstrings
  28. 28. 11 Sartorius muscles
  29. 29. 20 gastrocnemius

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