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Asked by anon-290019 on 23 Mar 2021.
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anon answered on 23 Mar 2021:
Hi,
Well it really depends what mean by live and move.
By move, can we say that plants move when they turn towards the sun?
Or by live is just having an active brain?
There a lot of philosophical questions that need answering to really get to the answer to your question!
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Lisa Orchard answered on 23 Mar 2021:
Hello. This is a really interesting question. Unfortunately, as a psychologist it is not something I know much about! I hope you can find an answer from one of the others perhaps! 🙂
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Alex Baxendale answered on 24 Mar 2021:
Hello!
This is definitely something a biologist would know more about the details of, but I can throw some of the things I do know about! Bones are not required to move our body, our muscles contract (squeeze themselves) which causes the movements of our bodies, the bones are there to keep our arms, legs, body, and so on, solid and upright (without bones our muscles would bend and be all wobbly). This is why some animals have what is called a carapace (like a crab, or lobster) where their insides are all squishy, but they are covered in a shell (which acts similar to bones). These animals can still move around because their muscles are still able to move them, and the outside ‘bone’ stops them from bending and going all wobbly. Some animals are also so small and simple they don’t eve need bones or shells (looking at slugs for this one). Finally, spiders are super cool – they use their muscles to bend their legs inward, but to stretch their legs out they use their own blood pressure to do it! So if you imagine that you have a bottle of water and you give it a small squeeze and a little water comes out the top, then give the bottle a hard squeeze and the water flies out – this is basically what spiders do to stretch their legs out! They are able to move around by pushing their blood in to their legs so they can walk around!The world around is super cool, and animals have developed all sorts of weird and wonderful ways to live out normal lives and get from A to B!
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Harry Piper answered on 25 Mar 2021:
Hi! I know absolutely nothing about this as a psychologist! However, my wife is a marine biologist so I’ve asked her for some input on this! Here is what she has told me!
Alex has talked about the use of fluid to help creatures such as invertebrates to move. This is called a hydrostatic skeleton (a water skeleton). Insects also don’t have blood like ours, it is mostly water, but also has other important substances that they need to live, like sugars, its usually a clear green colour, and it’s called hemolymph. This is what you see if you squish a fly. So it depends what you mean by live, but this is the bodily processes 🙂 -
David McGonigle answered on 26 Mar 2021:
Hiya, take! Bones are a relatively recent development in evolution: they’re an ‘endoskeleton’ – a skeleton that’s inside, instead of outside. Those organisms that have a hard outside, like a lot of insects: this is what we call an exoskeleton, an ‘outside’ skeleton. In a lot of these organisms, moving isn’t so different to how we move. For us, we move a muscle, and the bone (and usually there’s a joint involved, too) moves or pivots on that joint: like a hinge. For a lot of insects, the muscles are inside, so when they contract, the bit of the outside skeleton, the outside skeleton, moves towards the muscle. So basically, you’re dealing with an inside-out version of our movement!
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