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Topic 1.2 muscular system - whole ppt

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SEHS Topic 1.2

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Topic 1.2 muscular system - whole ppt

  1. 1. Muscular System SEHS Topic 1.2
  2. 2. IB Sports, exercise and health science Anatomy Starter-Group Activity Decide whether the following statements are true or false Topic 1 Anatomy 1. There are over 1,000 muscles in your body. 2. Skeletal, or voluntary, muscles are the muscles you can control. 3. Ligaments connect muscles to bones. 4. Your heart is a muscle. 5. A muscle gets strained when it is stretched too much. 6. A sprain happens when a tendon is stretched too much. 7. Muscles that are not used can get smaller and weaker. 8. You don’t need more than 30 min. of physical activity every day. 9. If something hurts when playing sports, you should play through the pain and it will go away.
  3. 3. IB Sports, exercise and health science Anatomy Starter-Group Activity Decide whether the following statements are true or false Topic 1 Anatomy STARTER – Group Activity Decide whether the following statements are true or false: 10. A balanced diet: a) Emphasizes fruits, vegetables, whole grains, and fat- free or low-fat dairy products like milk, cheese, and yogurt. b) Includes protein from lean meats, poultry, seafood, beans, eggs, and nuts. c) Is low in solid fats, saturated fats, cholesterol, salt (sodium), added sugars, and refined grains. d) All of the above
  4. 4. 1.2.2
  5. 5. IB Sports, exercise and health science Anatomy 1.2.2 Distinguish between the different types of muscle Topic 1 Anatomy  Skeletal  Cardiac  Smooth
  6. 6. IB Sports, exercise and health science Anatomy 1.2.2 Distinguish between the different types of muscle Topic 1 Anatomy Skeletal Muscles (striated and voluntary muscles) Attach to bones and have the main function of contracting to move the body Striated-appearance of light and dark stripes
  7. 7. IB Sports, exercise and health science Anatomy 1.2.2 Distinguish between the different types of muscle Topic 1 Anatomy Cardiac muscle only in the walls of the heart. Similar to: skeletal muscle -striated smooth muscle- involuntarily controlled Now complete the Types of Muscles section in your workbook!
  8. 8. IB Sports, exercise and health science Anatomy 1.2.2 Distinguish between the different types of muscle Topic 1 Anatomy Smooth muscle (Unstriated) Involuntary muscle due to our inability to control its movements. Found in the walls of hollow organs such as the stomach, esophagus, bronchi and in the walls of blood vessels. Now complete the Types of Muscles section in your workbook!
  9. 9. IB Sports, exercise and health science Anatomy REVIEW POINT 1.2.2 Distinguish between the different types of muscle Topic 1 Anatomy  Skeletal  Cardiac  Smooth DET PDHPE Distance Education Programme.
  10. 10. IB Sports, exercise and health science Anatomy Thinking What do we use our muscles for? Talk and make a list – 2 minutes Topic 1 Anatomy
  11. 11. IB Sports, exercise and health science Anatomy Topic 1 Anatomy MOVEMENT • Skeletal muscles contract exerting forces on the tendons • Tendons pull on the bones causing joint movement
  12. 12. IB Sports, exercise and health science Anatomy Topic 1 Anatomy MOVE SUBSTANCES • Cardiac muscle pumps blood • Smooth muscle moves food in the GI tract
  13. 13. IB Sports, exercise and health science Anatomy Topic 1 Anatomy STABALIZE • Postural muscles stabilize and maintain body positions
  14. 14. IB Sports, exercise and health science Anatomy Topic 1 Anatomy GENERATE HEAT • Body wants to be cozy • When temps drop, the body shivers to warm back up!
  15. 15. IB Sports, exercise and health science Anatomy REVIEW POINT Four functions of muscles Topic 1 Anatomy  Movement  Move Substances  Stabilize the body  Generate heat DET PDHPE Distance Education Programme.
  16. 16. 1.2.1
  17. 17. IB Sports, exercise and health science Anatomy Thinking What characteristics do ALL muscles have? Talk and decide Topic 1 Anatomy
  18. 18. IB Sports, exercise and health science Anatomy 1.2.1 Outline the general characteristics common to muscle tissue Topic 1 Anatomy • Excitability: ability to receive and respond to stimuli via generation of an electrical pulse • Contractility: ability of the muscle to contract and generate force when stimulated • Extensibility: ability of muscle to lengthen without damage • Elasticity: ability of muscle to return to resting length
  19. 19. IB Sports, exercise and health science Anatomy 1.2.1 Outline the general characteristics common to muscle tissue Topic 1 Anatomy • Atrophy: is the wasting of muscle tissue  Hypertrophy: is the increase in size of muscle tissue.  Controlled by nerve stimuli – A nerve impulse is required for movement to occur  Fed by capillaries – Muscles receive nourishment through the blood supply.
  20. 20. IB Sports, exercise and health science Anatomy REVIEW Can you write a definition for the words below without using your notes? Topic 1 Anatomy
  21. 21. 1.2.3 Annotate the Structure of Skeletal Muscle
  22. 22. IB Sports, exercise and health science Anatomy 1.2.3 Annotate the structure of skeletal muscle Topic 1 Anatomy Fascia is a connective tissue – three main roles - Transmit Force - Provide Support - Protect Tissue
  23. 23. IB Sports, exercise and health science Anatomy 1.2.3 Annotate the structure of skeletal muscle Topic 1 Anatomy
  24. 24. 1.2.4 – 1.2.5
  25. 25. Three Golden Rules of Skeletal Muscle Activity Muscles only contract and relax. Muscles only work on joints they cross. Muscles work best in the direction of their fibers. Tip – Muscles in front do one action – in back do the other. Origin is proximal, Insertion is distal. Larger end is often the origin
  26. 26. Muscle Attachment  Origin- end of muscle attached to immovable (or less moveable) bone  Insertion- end of muscle attached to moveable bone  During contraction, insertion moves toward origin
  27. 27. Interactions of Skeletal Muscles  Agonist/ Prime movers - are the muscles mostly responsible for the movement  Antagonists - oppose/reverse movement  Synergists - work with prime movers to stabilize the muscle  Fixators - work with prime movers to stabilize bone or origin. These are mostly found around the hip and shoulder joint.
  28. 28. Flexion (Bending) of the Arm • The muscle doing the work (contracting) and creating the movement is called the agonist. • The muscle which is relaxing and letting the movement take place is called the antagonist. Agonist (The biceps contract) Antagonist (The triceps relaxes) • Other muscles support the agonist in creating movement and these are called synergist (neutralizer). • Fixator (stabilizer) muscles that allow the agonist to work, stabilizing the origin Fixators and Stabilizers
  29. 29. Antagonistic Muscles • Skeletal muscles work across a joint and are attached to the bones by fascia known as tendons. • They work in pairs, each contracting or relaxing in turn to create movement. Ex.Biceps brachii and triceps brachii work in what is called Antagonistic Muscle Action. As one muscle shortens the other one lengthens.
  30. 30. TRUNK
  31. 31. Rectus Abdominis
  32. 32. External Obliques
  33. 33. Erector Spinae
  34. 34. UPPER BODY
  35. 35. Deltoid
  36. 36. Pectoralis Major
  37. 37. Biceps Brachii
  38. 38. Trapezius
  39. 39. Latissimus Dorsi
  40. 40. Triceps
  41. 41. LOWER BODY
  42. 42. Illiopsoas
  43. 43. Sartorius
  44. 44. Quadriceps
  45. 45. Tibialis Anterior
  46. 46. Glutes
  47. 47. Hamstrings
  48. 48. Gastrocnemius
  49. 49. TEST YOURSELF
  50. 50. 1
  51. 51. 2
  52. 52. 3
  53. 53. 4
  54. 54. 5
  55. 55. 6
  56. 56. 7
  57. 57. 8
  58. 58. 9
  59. 59. 10
  60. 60. 11
  61. 61. 12
  62. 62. 13
  63. 63. 14
  64. 64. 15

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