Skeletal System

Ravneet Dhaliwal

What it does…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…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

The skeleton…The skeleton…

How does it work…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

How does it work 2…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

How it works 3…How it works 3…

Hinge Ball and Socket

Saddle Gliding

Some examples of joints in the skeletal system…

How it works 4…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

How it works 5…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

How it works 6…How it works 6…

Ligaments-

Tendons-

What can happen if something goes wrong…

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

Osteoporosis…Osteoporosis…

How to promote proper functioning…

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!

Bibliography…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_f

ront.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