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Is it possible ?

Is it possible ?. Animals Support & Movement. Compact Bone. ?. Transverse section of a compact bones. Structure of cartilage. The skeletons are made up of bones and cartilages. Cartilage. Spongy bone containing red bone marrow. Compact bone. Cavity containing yellow bone marrow.

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Is it possible ?

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  1. Is it possible ?

  2. Animals Support & Movement

  3. Compact Bone

  4. ? Transverse section of a compact bones Structure of cartilage The skeletons are made up of bones and cartilages.

  5. Cartilage Spongy bone containing red bone marrow. Compact bone Cavity containing yellowbone marrow Bone structure

  6. Bone development

  7. Muscle for support

  8. Joint in body

  9. Synovial Joint 1. Hinge joints Type of Joints

  10. 2. Ball-and-socket joints How many planes of movement do ball-an-socket joints allow?

  11. Immovable jonint

  12. Slightly movable jonint

  13. pelvic girdle synovial joint ligaments femur Synovial joint structure synovial membrane cartilage

  14. Muscle

  15. Muscle fabulous

  16. Myosin and actin

  17. Actin attach to myosin

  18. Contraction at filament

  19. Contraction

  20. Whole muscle contract

  21. skeletal muscle • skeletal muscle: - muscles attached to bone surface - voluntary, under conscious control - gives powerful contraction and become thicker and shorter so movement of bones results

  22. skeletal muscle keep posture muscle tone body in fixed position - fatigue results when it contracts too long, as lactic acid accumulated in muscle cells due to anaerobic respiration • muscle contract

  23. muscle tendons Muscles and Skeleton • muscles are attached to skeleton by tendon • tendons are tough connective tissue, collagen

  24. How is movement achieved?Movement of Forearm triceps contracts biceps relaxes triceps relaxes biceps contracts • biceps and triceps are involved • forearm bends when biceps contracts and triceps relaxes and it straightens when their roles exchanged limbstraightens limbbends

  25. Biceps and triceps are antagonistic muscles involved in the movement of the forearm. They work in pairs and in opposing directions.

  26. members in antagonistic pair are flexor and extensor • flexor contracts to bend the limb while extensor straightens the limb when it contracts

  27. biceps attach to its origin and insertion by two tendons while triceps attach to origin and insertion with three tendons • contraction of biceps together with relaxation of triceps make forearm to move close to upper arm and vice versa for straightening of the limb

  28. Lever • lever is a bar which is turned about a fixed point which is called fulcrum • on one side of fulcrum is load and effort is applied on the other side. Force is transmitted along lever to the load • e.g. elbow joint

  29. E thirdorder lever system L F contractionof biceps (effort) • Hinge joints act as the fulcrum • Lower arm and hand act as load • Contraction of biceps creates the effort to lift up the arm and bends elbow elbow joint (fulcrum) hand (load)

  30. E L F L F E Other Types of Lever System in our Body Standing on tiptoes Second order lever system Nodding of head first order lever system

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