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Skeletal System

Skeletal System. Ravneet Dhaliwal. What it does…. The skeletal system has many important functions which include- Supporting the body Protecting internal organs Providing movement Stores mineral reserves Provides a site for cell formation. What it’s composed of….

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Skeletal System

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  1. Skeletal System Ravneet Dhaliwal

  2. What it does… • The skeletal system has many important functions which include- • Supporting the body • Protecting internal organs • Providing movement • Stores mineral reserves • Provides a site for cell formation

  3. What it’s composed of… • The skeletal system is made of bones • Bones are composed of mineral salts- mainly calcium and phosphorous • Bones are a solid network of living cells and protein fibers supported by deposits of calcium salts • For more info go here (read page and animation where it says Bones: Click here for a full diagram) • The skeletal system is also composed of joints which is a place where a bone attaches to another bone • It’s also composed of ligaments

  4. The skeleton…

  5. How does it work… • Skeletal muscles move bones • Joints permit bones to move without damaging each other • Depending on the movement of the joint, it is classified as immovable, slightly movable, or freely movable • Fibrous joints- connects bones without allowing movement (skull) • Cartilaginous joints- connect bones with cartilage allowing little movement (ribs) • Synovial joints- cavities between bones in these joints are filled with synovial fluid that lubricate and protect bones

  6. How does it work 2… • Types of joints… • Hinge: allows extension and retraction • Saddle: Allows movement back in forth but no rotation • Ball and Socket: Circular movement in any direction • Ellipsoid: Like ball and socket but limited • Pivot: Rotation around an axis • Gliding (plane): Bones slide past each other • More info here

  7. How it works 3… Hinge Ball and Socket Some examples of joints in the skeletal system… Saddle Gliding

  8. How it works 4… • Ligaments are fibrous tissue that connects bones other bones, a fold of peritoneum, or the remnants of tubular from the fetal period of life • Ligaments are dense connective tissue composed of fibers • Ligaments connect bones to bones to form a joint

  9. How it works 5… • Tendons (sinew) are fibrous connective tissue that connect muscle to tendon • They can withstand tension • Tendons are made of bundles of collagen fibers that are closely packed together

  10. How it works 6… Ligaments- Tendons-

  11. What can happen if something goes wrong… • Osteoporosis (disease) • Osteoporosis is a disease that weakens and thins the bones that they become brittle and fragile leading them to break easily • Risk factors- Old age, being a female, family history, being Caucasian or Asian… (etc) • Treatment- There is no treatment for osteoporosis but you can help prevent it by eating a lot of calcium and vitamin D, exercising, and in some cases medication • More information here

  12. Osteoporosis…

  13. How to promote proper functioning… • To promote proper functioning of the skeletal system and strong bones you can- • Eat a diet rich in vitamin D and calcium • Regular exercise • Limiting alcohol • Etc • For more information check this place out!

  14. Bibliography… • Information- • Prentice Hall Biology book (our textbook) • http://www.shockfamily.net/skeleton/JOINTS.HTML • http://www.nlm.nih.gov/medlineplus/osteoporosis.html • http://nihseniorhealth.gov/osteoporosis/whatisosteoporosis/01.html • http://www.health.state.ny.us/diseases/conditions/osteoporosis/promote.htm • http://www.kidshealth.org/kid/htbw/bones.html • Pictures- • http://www.shockfamily.net/skeleton/JOINTS.HTML • http://content.answers.com/main/content/img/oxford/Oxford_Body/019852403x.skeleton.1.jpg • http://www.web-books.com/eLibrary/Medicine/Physiology/Skeletal/long_bone.jpg • http://www.anatomiemodellen.nl/images/modellen/A135.jpg • http://www.chop.edu/images/medical_condition/skeleton.gif • http://osteoporosis.upmc.com/Images/Sub/PhotoOsteoporosis.jpg • http://www.mjain.net/images/F1.jpg • http://www.daviddarling.info/images/human_skeleton.jpg • http://content.answers.com/main/content/wp/en-commons/thumb/4/46/270px-Human_skeleton_front.svg.png • http://content.revolutionhealth.com/contentimages/images-image_popup-w7_osteoporosis.jpg • http://www.spineuniverse.com/displaygraphic.php/138/dp_ligaments-BB.gif • http://www.ehrs.upenn.edu/programs/occupat/ergo/images/tendons.jpg

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