What is human bone made of?

Answer 1

• The outer surface of bone is called the periosteum (say: pare-ee-os-tee-um). It's a thin, dense membrane that contains nerves and blood vessels that nourish the bone.
• The next layer is made up of compact bone. This part is smooth and very hard. It's the part you see when you look at a skeleton.
• Within the compact bone are many layers of cancellous(say: kan-sell-us) bone, which looks a bit like a sponge. Cancellous bone is not quite as hard as compact bone, but it is still very strong.
• In many bones, the cancellous bone protects the innermost part of the bone, the bone marrow (say: mair-oh). Bone marrow is sort of like a thick jelly, and its job is to make blood cells

Answer 2

Bones are made up of inorganic hydroxyapatites most of which are Calcium Phosphates (small tight crystals)

Answer 3

Bones are made of calcium, chondroitin sulfate and hydroxyapatite, the latter making up 70% of a bone.

Answer 4

A typical adult human skeleton consists of 206 bones.

Answer 5

uranium or jelly i cant quite remember

Answer 6

206