Questions and Answers
What percentage of the total body weight is made up of bone mass in the skeleton?
14%
At what stage of life does the total number of bones in the human skeleton decrease?
From adolescence to adulthood
What is the main function of the axial skeleton?
To protect the internal organs and provide structural support for the body
What is the approximate total number of bones in the human skeleton at birth?
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What are the two main parts of the human skeleton?
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Study Notes
Human Skeleton Overview
- The human skeleton is the internal framework of the human body.
- It is composed of approximately 270 bones at birth.
- This number decreases to around 206 bones by adulthood due to bone fusion.
Bone Mass
- The bone mass in the skeleton makes up about 14% of the total body weight.
- The average bone mass is around 10-11 kg for an average person.
- Bone mass reaches its maximum between the ages of 25 and 30.
Skeletal Division
- The human skeleton can be divided into two main parts: axial skeleton and appendicular skeleton.
Axial Skeleton
- The axial skeleton is formed by the vertebral column, rib cage, skull, and other associated bones.
Appendicular Skeleton
- The appendicular skeleton is attached to the axial skeleton.
- It is formed by the shoulder girdle, pelvic girdle, and bones of the upper and lower limbs.
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