PPT skeletal system 6th grade

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

17. 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

18. Muscles are soft and elastic

19. 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.

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

21. QUADRICEPS

24. TYPES OF MUSCLE
• SMOOTH
• CARDIAC
• SKELETAL

25. 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.

26. • SKELETAL MUSCLES ARE ATTACHED TO BONES
BY TENDONS

27. 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.

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

31. 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

32. 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)

33. FIXED JOINT

34. SEMI-MOVEABLE JOINT

35. MOVEABLE JOINT

38. 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