1 / 22

Skeletal System

Skeletal System. Structure of Bone. What are bones?. Why does milk do a body good? Which do you think is a better model of bone. A stick of chalk or a piece of sponge?. Functions of the Skeleton. Provides attachment for skeletal muscles and supports softer tissues

shaina
Download Presentation

Skeletal System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Skeletal System Structure of Bone

  2. What are bones? • Why does milk do a body good? • Which do you think is a better model of bone. A stick of chalk or a piece of sponge?

  3. Functions of the Skeleton • Provides attachment for skeletal muscles and supports softer tissues • Store and • Produces • Storage of

  4. Bone Cells Breaks down bone Maintains cellular activities of bone Create bone

  5. Structure of Bone • -a tough layer of connective tissue surrounding bone on outside

  6. Structure of Compact Bone Cont. • _____________ bone is a thick layer found just inside the periosteum that runs the entire length of bone • Made up of structural units called ___________ which consist of _______________, many hollow tubes of bone matrix that function as tiny weight bearing pillars • Resemble

  7. Compact Bone Structure Where lamellae meet there are spider shaped _______________ in lacunae (small holes) which help ______________________________

  8. Structure of Compact Bone Cont. • _______________ Canal • Runs through • Contains Central canal

  9. Central canal

  10. Spongy Bone • Found • Found in the ends of ___________________and in the middle part of short, flat bones • Made up of ___________________ which is a meshwork of bony bars that gives strength to the bone without adding mass • NO • Red bone marrow found in the spaces between trabeculae and makes

  11. Compact bone Spongy Bone

  12. Bone Remodeling • Bone resorption • __________________ break down bone matrix by forming grooves or pits and secreting enzymes and acids to digest the matrix and turn calcium salts into soluble forms • _____________________or build-up happens where bone is injured or where added bone strength is needed

  13. Bone Growth-Ossification • Grows in length in long bones at either end in regions know as • ________________ cells in this area divide and increase in number pushing older, larger cartilage cells toward the middle of the bone causing growth • The older cartilage cells die and the space the occupied is replaced with bone • At the end of puberty, the growth plate is replaced with bone and the person stop getting taller

  14. Living vs. Non-living Components • Living parts • Non-living Parts

  15. Effect of Exercise on Bone • Bones grow in thickness due to • ____________ must be placed on bones for ossification to occur because this force is what stimulates the _______________ to secrete the minerals that replace cartilage • What do you think might happen to bones that are not exposed to force, such as bones of astronauts in zero gravity?

  16. Broken Bone • How does broken bone heal? • Step 1: ______________forms at fracture site and bone cells deprived of nutrients soon die while tissue becomes swollen, painful and inflamed • Step 2: ____________________________forms splinting the broken bone • Step 3: callus is converted into ________________________________; begins 3-4 weeks after injury and continues until firm union about 2-3 months later • Step 4: _________________________________; compact bone reforms shaft walls and ______________________ remove unnecessary materials

  17. Osteoporosis • Bone mass is reduced making bone • Occurs most often in _________________________________________due to a decrease in production of __________________ which normally restrains osteoclasts and promotes deposit of new bone • Prevention: • Treatments

  18. Bone Videos • http://dsc.discovery.com/videos/human-body-strength-tornado-boy.html • http://dsc.discovery.com/videos/human-body-strength-street-gymnast.html • http://investigation.discovery.com/videos/the-real-ncis-bones.html

More Related