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The Skeletal System (Joints of the Skeleton (a place in the body where two…
The Skeletal System
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Bones, Strong and Living
Bone Strength
your bones are strong and lightweight, bones can absorb more force without breaking than granite or concrete can, also, bones are very light, so light that only about 20% of an average adult's body weight is bone
Bone Growth
bone cells form new bone tissue as you grow, but even after you are grown bone tissue continues to form within your bones
How Bones Form
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over time, most of the cartilage in your body turns in hard bone tissue
The Structure of Bones
the spaces in bone contain a soft connective tissue called marrow, or bone marrow
there are two types of marrow, red and yellow, red marrow produces the body's blood cells, yellow marrow stores fat, which serves as an energy reserve
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