• Question: What is inside a crab?

    Asked by Libster to Lydia on 20 Nov 2014.
    • Photo: Lydia Bach

      Lydia Bach answered on 20 Nov 2014:

      Heya,

      they have lots of similarities with human organs (and lots of things that are different).
      The have the same sensory organs (except for ears!) – they have eyes, they can smell (only that they can smell in the water!) and they have touch – they use their antenna instead of the skin!
      They have a heart and blood like we do, but theirs in blue and not red, and unlike us they have gills to get their oxygen from sea water.
      If you dissect them you can also see their gills, which are grey of colour and on the side of their body.
      They have a stomach and gut. A digestive gland provides the gut with enzymes and other chemicals that aid food digestion. Crabs have a brain near their eye region, which looks less like a human brain, but more like a ring of nerve cells which looks white/ yellowish.
      There are also a lot of muscles and of course sexual organs.

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