10 - the skeletal and muscular systems - the skeletal and muscular systems.pdf · 10 the skeletal...
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10 The Skeletal and Muscular Systems
R. Cummins 1
September 02, 2013
The Skeletal and Muscular Systems
Functions of the Skeleton,
1. Support we can stand and support ourselves2. Movement we can move with the help of muscles3. Protection protects organs,e.g. brain, heart
So why do we have a skeleton?
10 The Skeletal and Muscular Systems
R. Cummins 2
September 02, 2013
Dem bones dem bones.....need Calcium!
Calcium is a hard mineral element that strengthens our bones.
Bones
10 The Skeletal and Muscular Systems
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September 02, 2013
What Animals?
10 The Skeletal and Muscular Systems
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Teeth
10 The Skeletal and Muscular Systems
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Joints and Movement
Fused joints in your head. The plates grow into each other.
Synovial Joints These joints can move and have synovial fluid to keep them moving smoothly.
1. Ball and Socket Joint they can swivel in many directions. e.g. in your hip and shoulder.
2. Hinged Joint can move in one direction only.
10 The Skeletal and Muscular Systems
R. Cummins 6
September 02, 2013
Structure of a Moveable JointA pad of Cartilage acts as a shock absorber between bones.A lubricating fluid called synovial fluid helps keep the joint moving.
Ligaments join bone to bone and hold the joint together.
10 The Skeletal and Muscular Systems
R. Cummins 7
September 02, 2013
Muscles and Movement
Tendons connect muscles to bone.The Achilles tendon is shown here.Often it can snap and has to be sown back onto the bone.
10 The Skeletal and Muscular Systems
R. Cummins 8
September 02, 2013
Antagonistic MusclesThese are muscles that pull against each other.They work together to move bones.An example is biceps and triceps in your arm.When you contract your bicep the arm moves up.When you contract your tricep, the arm moves down.
10 The Skeletal and Muscular Systems
R. Cummins 9
September 02, 2013
10 The Skeletal and Muscular Systems
R. Cummins 10
September 02, 2013
10 The Skeletal and Muscular Systems
R. Cummins 11
September 02, 2013