brain pop bone photos virtual skeleton uss/anatomy/skel/skeletal.htm

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Produce Blood Cells

Produce Blood Cells

Hearing

Regulate Calcium Salt

Bones are made up of different layers•Outer Membrane: thin and tough, it covers all of the bone except the endsBlood vessels and nerves enter and leave the bone through the membrane•Compact Bone: hard and dense but not solidSmall canals carrying blood vessels and nerves from the bone’s surface to the living things within the cell. Blood vessels and nerves run through the compact bone•Spongy Bone: lightweight and strongLocated just inside the compact bone and also found at the ends of the boneLike a sponge, spongy bone has small spaces within it Bone Marrow-soft connective tissue found in the spaces in bone

Two types of bone marrow:•Red marrow-produces blood cells•Yellow marrow-stores fat that serves as an energy reserve

Joints of the Skeleton

A Joint is a place in the body where two bones come together Joints allow bones to move in different ways. There are two kinds of joints in the body:ImmovableMovable Immovable joints connect bones in a way that allows little or no movementEx: the bones of the skull are held by immovable joints the ribs attach to the sternum by immovable joints Movable joints allow the body to make a wide range of movements

gliding

Joints animation http://www.phschool.com/atschool/phsciexp/active_art/skeletal_and_muscular/index.html

Four Types of Movable JointsBall and socket joint-allows the greatest range of motion• Lets you swing your arm and leg freely in a circle• Located in your shoulder and hips Pivot joint-allows one bone to rotate around another• Lets you turn your head from side to side• Located in the top of your neck Gliding joint-allows one bone to slide over another• Lets you bend and flex your wrist and make limited side to side motion• Located in your wrists and ankles Hinge joint-allows forward and backward motion• Lets you bend and straighten your arms and legs• Located in your elbows and knees• Manipulate joints game

http://www.bbc.co.uk/science/humanbody/body/interactives/3djigsaw_02/index.shtml?skeleton