Musculoskeletal System

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Musculoskeletal System
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Musculoskeletal system refers to the muscles and
skeleton of the human body.
Our muscles and skeleton work together to protect
organs, enable movement and give the body its
general shape.
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The Skeletal System
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The Skeletal System

• The skeleton is a group of bones and cartilage
  which provide a framework for the muscle
  attachment.
• The skeleton helps protect the bodys vital
  organs.
• For example - the rib cage
  protects the lungs and heart. - the skull
  protects the brain.

• Bone marrow produces our blood cells
• (illustration on the following page)

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A Look at Bone Marrow
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Joints

• A joint (join - t) is the area where two bones
  connect.
• A joint enables us to bend, twist and rotate.
• Most joints are moveable.

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• Four Types of Moveable Joints

Name Function Example
Ball-and-Socket Joints Enable bones to move in all directions. hips shoulders
Hinge Joints Enable bones to move in two directions. knees elbows
Pivot/Rotating Joints Enable side to side rotation. neck
Gliding Joints Enable flat bones to glide over each other hands spine
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Four Types of Moveable Joints
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The Muscular System
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• Muscular System
• Muscles attach to the skeleton whereby
• holding the skeleton together
• giving the body its general shape
• enabling movement
• Muscle contractions help to control body
  processes such as breathing, digestion and blood
  flow.
• Skeletal muscles are voluntary muscles.

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• Voluntary and Involuntary Muscles
• 1. Voluntary Muscle contractions are controlled.
  
• Example skeletal muscles (biceps and
  triceps)
• 2. Involuntary Muscle contractions occur
  automatically.
• Example cardiac (heart) muscles