The Skeletal System


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framework of the body

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The Skeletal System

  1. 1. The Skeletal System
  2. 6. Framework of the Body Support of the body
  3. 7. The Skeletal System <ul><li>-it is made up of bones that keep your body upright. </li></ul><ul><li>Skeleton- is the hardened framework of the body that serves to support and protect soft tissues. </li></ul>
  4. 8. Two types of Skeleton <ul><li>1. Exoskeleton (external)- is a hard body covering found in some animals like insects, crabs, and shrimps. The organs of these animals are located inside the skeleton. </li></ul>
  5. 9. 2. Endoskeleton (internal) <ul><li>Is a skeleton found inside the body of animals with backbones like dogs, snakes and humans. </li></ul>
  6. 10. Total number of bones of humans <ul><li>Baby- 350 bones </li></ul><ul><li>Adult- 206 bones </li></ul>
  7. 11. Functions of the Skeletal System <ul><li>1 . It gives shape and form to the body. </li></ul><ul><li>2. It serves as anchor to which muscles are attached to help them move. </li></ul><ul><li>3. It produce red blood cells. </li></ul><ul><li>4. It serves as storage of calcium. </li></ul><ul><li>5. It protects some internal organs. </li></ul><ul><li>6. Allows us to move. </li></ul>
  8. 12. Parts of the Skeletal System <ul><li> </li></ul><ul><li>1 . Axial Skeleton (80 bones) </li></ul><ul><li>a. skull– 29 bones in all </li></ul><ul><ul><ul><ul><ul><li>14 facial bones </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>6 ear bones </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>1 bone at the back of the tongue </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>8 cranium bones </li></ul></ul></ul></ul></ul>
  9. 14. <ul><li>b. backbone/spine—attached to the base of the skull. </li></ul><ul><ul><ul><ul><li>--26 bones called vertebrae </li></ul></ul></ul></ul>
  10. 16. c. breastbone/sternum-
  11. 17. Sternum/Breastbone <ul><li>It encloses the heart and lungs. </li></ul><ul><li>24 ribs </li></ul><ul><li>10 pairs are attached to the breastbone </li></ul><ul><li>2 pairs are floating </li></ul>
  12. 18. 2. Appendicular skeleton(126 bones) <ul><li>Bones that are attached to the axial skeleton. </li></ul><ul><li>*** collar bones, shoulder blades, arm bones, hipbones and leg bones. </li></ul><ul><li>A. collar bone/clavicle- 2 bones </li></ul>
  13. 20. clavicle
  14. 21. b. Shoulder blade/scapula <ul><li>-flat and triangular- 2 bones </li></ul><ul><li>.c. Arm and hand bones-3 bones </li></ul><ul><li>1 upper and two lower </li></ul><ul><li>27 bones </li></ul>
  15. 22. d. Hipbones <ul><li>Attached to the backbone </li></ul><ul><li>Hipbones form a ring called the  </li></ul>
  16. 23. e. Upper leg/femur- <ul><li>Longest bone in the body. </li></ul><ul><li>Lower legs- 2 bones </li></ul><ul><li>Each foot- 26 bones </li></ul>
  17. 25. Answer the following. <ul><li>1. Other term for breastbone. </li></ul><ul><li>2. Number of an adult bone. </li></ul><ul><li>3. Number of a baby bone. </li></ul><ul><li>4. The longest bone. </li></ul><ul><li>5. Two main parts of the skeleton. </li></ul><ul><li>6. The framework of the body. </li></ul>
  18. 26. Assignment: Science 4 <ul><li>Name bones that protect some internal organs. </li></ul>
  19. 42. <ul><li>Name those bones. Name those bones. </li></ul><ul><li>I have a cranium, for my brainium. And a mandible that's, my jawbone. And there's my clavicle, that's my collarbone. And my sternum keeps my ribs at home. </li></ul><ul><li>Name those bones. Name those bones. </li></ul><ul><li>All my vertebrae are running down my back From my head to my pelvic bone. My femur fits in there, a leg bone I declare It's the longest bone that I have grown. </li></ul><ul><li>Name those bones. Name those bones. </li></ul><ul><li>Patella fits in next, that's my kneecap, And below it are two more leg bones. My tibia in front, my fibula in back, Keep me running at school or home. </li></ul><ul><li>Name those bones. Name those bones. </li></ul><ul><li>Now moving down my arm, let's start with humerus Followed by two more arm bones. There's an ulna and a radius My ulna makes up my elbow bone. </li></ul><ul><li>Name those bones. Name those bones. </li></ul><ul><li>All my fingers, all my toes, They're called phalanges, everybody knows. And on my back you'll find, two shoulder blades in line, We call them scapula every time. </li></ul><ul><li>Name those bones. Name those bones. </li></ul>