Monday, 14 November 2011

The Sketetal System: - Human Bones


The Skeletal System:
There are around 206 bones in the skeletal system of an adult. Bones of hands and feets only constitute 50 % of the total bones in the human body.
A new born baby has 300 bones, out of which 94 bones fuse together as it grows.
The Largest bones in the human body is the femur in the thigh. The average length of this bone is 50 cm.
The shortest bone in Human body is the Stirrup bone in middle ear.

Composition of Bones
Percentage
Organic Matter
33.30%
Phosphate of Lime
51.04%
Carbonate of Lime
11.30%
Flouride of Calcium
2.00%
Phosphate of Magnesia
1.16%
Soda/Chloride of Sodium
1.00%

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