the skeleton and joints wk3
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- 1. The Skeleton and Joints What the skeleton does
- 2. The Skeleton
- The skeleton is the basic framework of the body. It has four major functions:
- Blood production
- It is important to remember that the body has other systems that support and enhance these functions as well.
- The four major functions have a direct affect on how well or how much physical activity you can do.
- 3. Shape and Support
- Without its rigid skeleton the body would have nothing to support its self on. It is the skeleton that gives each of us our own unique shape and frame.
- The skeleton also determines size. Taller people will have longer bones then shorter people. Sturdiness (thickness of bones) can also effect people often determining overall body weight.
- 4. Movement
- So how does the skeleton move?
- Each joint has muscles either side of it, as these muscles contract (get smaller) they allow the joint to perform the movement required by the body.
- This kind of movement is called articulation.
- Its not just the joints that are important when moving the skeleton also provides a base for the muscles to attach.
- Without this the muscles could not move and physical activity would be limited
- 5. Range of movement
- Greatest Range of Movement
- 6. Range of movement
- Smaller Range of Movement
- 7. Protection
- The skeleton also fulfils a very important role in protecting the vital soft tissue organs of the body. Most important are:
- Rib Cage: protects the heart and lungs.
- Pelvic Girdle: protects the abdomen
- Spinal Column: protects the spinal chord
- Skull : protects the brain
- 8. Blood production
- The body makes blood in the bone marrow
- Blood contains both red and white blood cells
- The red blood cells carry oxygen to muscles, which they need in order to work
- The white blood cells fight infection in the body.
- 10. Types of bones
- There are over 200 bones in the body
- There are over 100 joints in the body
- Bones are divided into four main types:
- Flat bones: the scapula, sternum, cranium, pelvis and the ribs.
- Irregular bones: the vertebrae, patella.
- Long Bones: bones in arms (humerus) and legs (femur).
- Short bones: carpals and tarsals.
- 11. Flat Bones
- Flat bones and irregular bones are usually protective bones.
- The skull, ribs and pelvis protect vital organs.
- 12. Irregular bones
- Bones that are not the same shape as each other.
- The vertebrae bones and patella are good examples.
- 13. Long Bones
- Long bones are the levers where the movement in the body takes place.
- The arm contains three:
- The leg also has three:
- 14. Tasks
- Label as many bones as you know on the skeleton.
- State next to each bone whether they are a long bones (L), irregular bone (I) or flat bone (F).
- Work in pairs to label the rest of the skeleton.
- 15. Joints of the Human Body
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