• Question: What are our bones made of?

    Asked by yuliya to Amy, Karen, Sarah, Vijay, Will on 18 Jun 2012.
    • Photo: Amy Birch

      Amy Birch answered on 18 Jun 2012:

      Hi yuliya,
      Bones are made of collagen, other minerals and calcium. There are two layers in bone: compact bone forms the outer shell of all bones and the shaft in long bones, and spongey bone is found in the heads of long bones and in irregular bones. Spongey bone is must less dense than compact bone and contains bone marrow which is where blood cells are produced.
      I’m no expert though – I bet Vijay can give a better answer than me! 🙂

    • Photo: Sarah Martin

      Sarah Martin answered on 20 Jun 2012:

      Hi yuliya,

      Here you go! Complete with diagram.

      🙂 Sarah

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