Bones
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Transcript of Bones
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BonesYear 10AADP
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The Skeletal System• The human adult
body has 206 bones.
• The human baby when born has between 300 and 350 bones.
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Interesting skeleton facts!• 1. The smallest bone in the human body is the
stapes or stirrup bone located in the middle ear. It is 2.8mm in length.
• 2. Human thigh bones are stronger than concrete, the Femur bone as it’s called – the biggest and strongest bone in our body. It is easily capable of lifting or supporting 30 times its own volume and weight or up to 2 African elephants.
• 3. There are about 206 bones in a grown-up’s body. But more than half of them are located just in our hands and feet!
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More facts4. Apart from having more bones, another interesting baby fact is that they don’t have kneecaps!
5. . There are around 14 bones are in the face, 8 bones are in each wrist, 27 bones in each hand, 23 bones are in each foot including the ankle and 30 bones in the skull.
6. Bones consist of 50% water and 50% solid matter.
7. Adult human bones account for 14% of the body’s total weight.
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Functions of the skeleton• The skeleton has 4
major functions.
1. It supports the organs and muscles of the body.
2. It provides protection for internal organs.
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Functions of the skeleton
3. It provides a base for muscles to attach and allows movement.
4. The bones are where red and white blood cells are made and storage of minerals.
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Axial and Appendicular Skeleton• The skeleton is
divided up into 2 main groups.
• The axial skeleton and appendicular skeleton.
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The Axial Skeleton• The axial skeleton
consists of.
• The skull• The spine• The ribs and
sternum
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The Appendicular Skeleton• The Appendicular
Skeleton consists of
• The shoulder, arm and hand (shoulder girdle).
• The pelvis, leg and foot.
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The Spine (vertebral column) • The spines purpose is
protection, movement and support.
• It consists of the• Cervical vertebrae• Thoracic vertebrae• Lumbar vertebrae• Sacrum• Coccyx
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The Spine• 33 vertebrae• 7 cervical• 12 thoracic• 5 lumbar• 5 sacrum (fused)• 4 coccyx