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Skeletal System

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Katie Lipps

on 27 April 2010

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Transcript of Skeletal System

Skeletal System What is the Skeletal System? The hard structure
(bones & cartilages)
that provide the
frame for the body Basic Facts 350 bones in infant
208 bones in child
206 bones in adult
Soft tissures and organs are attached to bones
Brain is protected by skull
Heart and lungs protected by rib cage
Bones are connected to
other bones by ligiments Ligiments: A sheet or band of tough fibrous tissue connecting bones Bones are connected to
muscle by tendons
Jelly like substance inside of a bone
produces blood cells for the body
bone recieves blood, food and oxygyn
through blood vessels that run through
the bone. Bone Marrow Cranium Phalanges Phalanges Sternum Ribs Humerus Radius Ulna Patella Femur Fibula Tibia Ilium Ischium A cord or band of
inelastic tissue
connecting a muscle
with its bony attachment Made of 22 bones
Supports the structures of the face, and prevents head injury.
Protects brain
fixes position between both eyes to allow stereoscopic vision
Fixes position between ears to allow the brain to use auditory cues for sense of direction three-dimensional vision produced by the fusion of two slightly different views of a scene
Flat "T" shaped bone in the center of the chest
Connects to the ribcage, therfore, helps to protect the lungs, heart, and major blood vessels
Humans have 12 pairs of ribs
Long curved bones form rib cage
Holds chest out, allowing lungs to expand and contract
Protects lungs, heart, and other internal organs of the thorax (chest)
Runs from the shoulder to the elbow
Connects the Scapula (Shoulder blade)to the lower arm
Largest and uppermost bone of the Pelvis
Common site for bone marrow donation
Serves as an attachment site for lateral muscles and the back of the pelvis
Protects the digestive and urogenital systems and the hip.


the inner and longer the two bones in the forearm
Paralell with radius
associated with elbow and wrist joints


Fingers and toes
Can flex, extent, abduct and adduct
flexion is the strongest movement
Abduct: drawing away from the midline of the body

Adduct: To bring a limb twards the body The bone that extends from the elbow to the thumb side of the wrist
Joins with the humerus Longest and largest bone
Can support up to two times the weight of an adult
Connects with hip joint and knee joint
Below the Ilium
lowest of three bones that form the pelvis
forms the lower back portrion of the hip bone

Knee cap
Small round, triangular bone
protects the knee joint
function= knee extension


Calf bone
located on lateral side of the Tibia Shin bone
larger and stronger than fibula
In men it goes straight up and down
In women, it is at a slight angle

Spine Spine:
long, thin, tubular bundle of nervous tissue and support cells that extends from the brain
About 45 cm long
conducts moter information
conducts sensory information
the center of cordination reflexes
Broken up into 4 sections




the location at which two or more bones make contact. They are constructed to allow movement and provide
THere are three main types of joint
Fibrous (immoveable)
Cartilagenous (partially moveable)
Synovial (freely moveable).


Joints Fun Facts!
•Our bone is six times stronger than steel if both are of the same weight.
•The size of the smallest bone is equivalent to the size of a rice grain.
•Of the 206 bones in the skeletal system, 52 of them make both our feet Conclusion:
The skeletal system is the main structure of our bodies, it has alot of bones, all with different functions, and they used to protect and move our bodies
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