This school year we are focusing on living things. Evey has decided that we should start with human beings – mostly because we bought a model that comes apart and she likes to play with the organs. What a psychologist might make of that I don’t know, but in the meantime, I am harnessing her fascination and researching the human body with her. The first part of the model to go together is the skeleton and here are nine fun facts we discovered while we research human bones:
- The hyoid bone in the throat is one of the few bones that are not connected to another
- An average adult human weighs more than six times the weight of its skeleton.
- Babies are born with around 300 bones. As you grow up many of the bones, such as those in the skull, fuse together so that most adults have 206 bones.
- Your hands and feet contain more than half of the bones in your body. There are 27 bones in each foot and 26 in each hand.
- Your spine is made up of 33 bones.
- The heaviest bone in your body is the femur (the thighbone). It is also the longest.
- A cube of bone that is 1/2 inch on each side would be able to support 1,733kg – the same weight as an adult hippopotamus.
- Bones are light because they are not solid. Inside they look a bit like honeycomb.
- The spaces in the bone are filled with a jelly like substance called marrow. Marrow in particular bones is responsible for the formation of red blood cells.