skeletalsystem6-150119033859-conversion-gate02 (1).pptx

Skeletal System and Its functions

1. THE MUSCULOSKELETAL SYSTEM

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. BONES MUSCLES

4. THE HUMAN SKELETON Humans have got an internal skeleton . It is made of 206 different bones . Bones are rigid and hard .

5. Functions of the skeleton : 1--- It supports the body and helps to keep its shape .

6. 2--- It protects the body’s soft organs , like the brain , the lungs and the heart .

7. Bones can move because they are connected to muscles . 3---So movement is another function of the skeleton .

8. BONES Bones can be different shapes and sizes . There are long bones , short bones , flat bones and cylindrical bones .

9. The FEMUR is the longest bone in the body .

10. The PELVIS is the biggest bone in the body .

11. the EAR BONES are the smallest bones in the body .

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. SKULL / CRANIUM

14. The bones in the torso are: The spine The sternum The ribs

15. THE SPINE IS FORMED BY 33 VERTEBRAE

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/body/interactives/3djigsaw_02/index.shtml?skeleton

17. The muscular system Muscles are soft and elastic

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. When a muscle contracts it becomes shorter . When a muscle relaxes it becomes longer . CONTRACT ----------------- SHORTER RELAX--------------------------- LONGER

20. QUADRICEPS

21. TYPES OF MUSCLE SMOOTH CARDIAC SKELETAL

22. SKELETAL Muscles that are attached to bones are skeletal muscles. Skeletal muscles are also called voluntary muscles. Voluntary muscles are muscles that you can consciously control.

23. SKELETAL MUSCLES ARE ATTACHED TO BONES BY TENDONS

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 through vessels throughout your body .

25. Smooth muscles They are muscles found in the stomach , intestines and bladder . They contract and relax to digest the food we eat .

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. Joints Joints are places where two or more bones are connected . There are 3 types : Fixed : they cannot move Semi-moveable : they can move a little ( vertebrae ) Moveable : they can move a lot ( elbows , knees , shoulders )

28. FIXED JOINT

29. SEMI-MOVEABLE JOINT

30. MOVEABLE JOINT

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