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Skeletal system 6

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PPT skeletal system 6th grade

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Skeletal system 6

  1. 1. THE MUSCULOSKELETAL SYSTEM
  2. 2. THE MUSCULOSKELETAL SYSTEM • It is composed of many muscles and bones. • It lets you move your body parts and go from one place to another.
  3. 3. BONES MUSCLES
  4. 4. THE HUMAN SKELETON • Humans have got an internal skeleton. It is made of 206 different bones. • Bones are rigid and hard.
  5. 5. Functions of the skeleton: • 1---It supports the body and helps to keep its shape.
  6. 6. • 2---It protects the body’s soft organs, like the brain, the lungs and the heart.
  7. 7. • Bones can move because they are connected to muscles. • 3---So movement is another function of the skeleton.
  8. 8. BONES • Bones can be different shapes and sizes. • There are long bones, short bones, flat bones and cylindrical bones.
  9. 9. • The FEMUR is the longest bone in the body.
  10. 10. • The PELVIS is the biggest bone in the body.
  11. 11. • the EAR BONES are the smallest bones in the body.
  12. 12. We can put the human bones into three groups: 1--- bones in the head 2--- bones in the extremities ( arms and legs) 3--- bones of the torso HEAD EXTREMITIES TRUNK
  13. 13. SKULL / CRANIUM
  14. 14. The bones in the torso are: The spine The sternum The ribs
  15. 15. THE SPINE IS FORMED BY 33 VERTEBRAE
  16. 16. https://www.youtube.com/watch?v=Of3XS-gU8dc https://www.youtube.com/watch?v=ChhPpAKKqHI https://www.youtube.com/watch?v=UXtG052Klkg http://www.bbc.co.uk/science/humanbody/bo dy/interactives/3djigsaw_02/index.shtml?skele ton
  17. 17. Muscles are soft and elastic
  18. 18. There are more than 600 muscles all over the human body. Muscles are made of muscle cells. These cells can contract and relax. Muscles contract and relax to make your body parts move.
  19. 19. When a muscle contracts it becomes shorter. When a muscle relaxes it becomes longer. CONTRACT ----------------- SHORTER RELAX--------------------------- LONGER
  20. 20. QUADRICEPS
  21. 21. TYPES OF MUSCLE • SMOOTH • CARDIAC • SKELETAL
  22. 22. SKELETAL • Muscles that are attached to bones iare skeletal muscles. • Skeletal muscles are also called voluntary muscles. • Voluntary muscles are muscles that you can consciously control.
  23. 23. • SKELETAL MUSCLES ARE ATTACHED TO BONES BY TENDONS
  24. 24. CARDIAC MUSCLE • Your heart is made of cardiac muscles, which • are found only in the heart. • A cardiac muscle is a type of involuntary muscle, which is muscle you cannot consciously control. • As cardiac muscles contract and relax, they pump blood through your heart and throughvessels throughout your body.
  25. 25. Smooth muscles • They are muscles found in the stomach, intestines and bladder. • They contract and relax to digest the food we eat.
  26. 26. Muscles have got different shapes: • Long muscles: like the ones in your legs • Flat muscles: like the ones in your face • Circular: like the ones around your arms
  27. 27. Joints • There are 3 types: 1. Fixed: they cannot move 2. Semi-moveable: they can move a little (vertebrae) 3. Moveable: they can move a lot (elbows, knees, shoulders)
  28. 28. FIXED JOINT
  29. 29. SEMI-MOVEABLE JOINT
  30. 30. MOVEABLE JOINT
  31. 31. which includes The bones of the head The bones of the trunk The bones of the extremities The muscles of the trunk The muscles of the extremities which include The muscles of the face includes THE MUSCULOSKELETAL SYSTEM HUMAN SKELETON MUSCLES

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