Why Is Our Skeleton On the Inside?
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Published 2020-07-28
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Having bones is pretty cool. They make our blood, let us hear, and keep us from being just a squishy puddle on the floor. But for every species with bones, there are at least 20 species on Earth with exoskeletons instead. And those exoskeleton animals are incredibly tough and strong. So why don’t WE have our skeletons on the outside? This is the story of bones!
References: sites.google.com/view/why-our-skeletons-on-inside/…
Special thanks for research assistance:
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All Comments (21)
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Why do some animals have exoskeletons and some have internal skeletons? This question popped into my head one day and the answer turned out to be more interesting than I could have imagined. Skeletons are amazing. Let me know what you thought of the video! I'm on Twitter & Instagram @DrJoeHanson @okaytobesmart
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Evolution: Would you like to have skeleton inside or outside. Turtles: Yes.
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"life remained squishy for a while" oh how I wish my biology teacher talked the way u did to me
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The ironic part of the intro is that Strongman competitions do have plane pulling and Thor won the 2016 plane pull event.
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I actually recall hearing from my Vertebrate Zoology professor that the exoskeletons of ancient vertebrates may actually have mainly functioned as calcium sinks to allow for calcium use in cellular functions, and it became repurposed for skeletal functions, which is pretty cool. Also, vertebrates aren't the only animals who turned inside out like this. Keepers of pet birds may recall the cuttlebones sometimes given to them in their cages. Apparently those internal "bones" cuttlefish have are actually the equivalent of the shells of nautilus/ammonites, so cephalopods put their shells on the inside as well. I've even heard of some cephalopod species which use these internal shells as muscle attachments, meaning they actually do have skeletal bones (albeit very few of them), which is pretty neat.
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This was really well written Joe. I loved how you phrased certain parts.
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Evolution: Do you want skeleton inside or outside? Sharks: no
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Its hard to imagine how elephantsize crab would molt. Without skeleton It would just flatten out.
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Biology was my favorite class in school. The thought of a completely different evolution just makes the mind wander haha. It's a fun thing to think about
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Me: Imma go to sleep Youtube: Why do you have skeleton
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I wouldn’t attempt to arm wrestle that chimera ant if I were you
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0:02 This man can lift a polar bear. A monster
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Awesome awesome awesome. I just subscribed tonight and I love how you explain things. Definitely dope
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"you're just meat, in a sack, tied to a bunch of carefully organized rocks" Existential crisis: "heya imma here"
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Exoskeleton: -Insane strength -less pain -sturdy -difficulty in uprighting oneself upon flipping -slow -permanently damaged exo armor Skeleton -extra dynamic and fluent mobility -lighter body -amplified pain -squishy externals -regenerable external armor -more room for modifications
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I swear that little animation of the Mountain waddling around cracked me up real good
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I learnt a lot from this video so thanks for educating us
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Exoskeleton: Strength and Defense. Skeleton: Flexibility and Mobility.
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Imagine you have an exoskeleton and your back starts itching.
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7:10 "I'm so tried of nachos " 😂