this post was submitted on 16 Apr 2025
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Science Memes

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[–] Gullible@sh.itjust.works 75 points 1 week ago (9 children)

So if I understand you correctly, if I remove my lungs, I’m a bee? My aunt had lung cancer, so they’ll probably kill me, anyway. I’ll report back on the results.

[–] tahoe@lemmy.world 81 points 1 week ago (10 children)

No because you’re likely too big (no offense) :(

I think insects have little holes all over their bodies, in which air gets inside by itself through some physics shenanigans. It doesn’t need to be actively sucked in like with lungs, it just happens because they’re so small.

This method doesn’t scale up though since if you’re bigger, you need more air, and having little holes all over your body won’t cut it. Thats when you know you need lungs, and that’s why you don’t see insects the size of a dog these days (thankfully).

There used to be times in the Earth’s history (Carboniferous) where the air’s composition was different though, and since it had more oxygen in it, insects could grow a lot larger.

[–] Metz@lemmy.world 53 points 1 week ago (4 children)

Fun fact: Cutaneous respiration (aka "Skin breathing") is something we humans do too. But it accounts only for 1% to 2% of our oxygen input.

However, the cornea of ​​our eyes doesn't have its own blood vessels to supply it. Therefore, it relies on direct gas exchange with the environment—in other words, skin respiration.

Our eyes breath like bees.

[–] dave@feddit.uk 28 points 1 week ago (1 children)

Is that why bees can't wear contact lenses?

[–] Remember_the_tooth@lemmy.world 42 points 1 week ago (1 children)

No, it's because they have compound eyes. Even if they could afford all the different lenses they need, they'd never have enough time to put them in and take them out, while still working a full day.

[–] Swedneck@discuss.tchncs.de 12 points 1 week ago (1 children)

surely they could just make one big lens with facets in it? sure they're gonna be hellishly expensive but at least they're usable

[–] Remember_the_tooth@lemmy.world 18 points 1 week ago (5 children)

Honestly, I was already out of my depth with the entomology and ophthalmology discussed here. The economics of bee optometry might be a bridge too far for me. Can a bee make enough honey to afford such lenses? If so, does it improve the bee's ability to make honey enough to justify the cost? I have no idea and no clue regarding how to investigate this issue.

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[–] Remember_the_tooth@lemmy.world 13 points 1 week ago

Adding to this, the holes (spiracles) connect to the tracheae, which connect to air sacs. While respiration is almost entirely passive in smaller species, larger species actually force air through the system to aid the otherwise passive process.

https://en.m.wikipedia.org/wiki/Respiratory_system_of_insects

Side note: Spiders have book lungs. They're not insects, but like insects, they are arthropods.

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[–] Remember_the_tooth@lemmy.world 26 points 1 week ago (8 children)

Yeah, and if you pluck a chicken, it will be a human, because it's featherless and stands on two legs.

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[–] trxxruraxvr@lemmy.world 12 points 1 week ago (3 children)

That is almost how it works, but to really become a bee you'll have to turn the lungs into wings. Good luck. I'm looking forward to seeing the result.

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[–] tiredofsametab@fedia.io 66 points 1 week ago (9 children)

And, for the most part, humans' lungs don't have bees!

I somehow forgot about bees not having lungs. I knew some other small things didn't.

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[–] count_dongulus@lemmy.world 57 points 1 week ago (4 children)

Beekeepers intentionally use smoke to make bees docile during collection time, transfers, etc

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[–] Reddfugee42@lemmy.world 54 points 1 week ago (6 children)

This is (fortunately) why there's a maximum size on insects. The environment is less oxygen rich today than in the eras of giant insects in the past. They reach a size where oxygen can't penetrate deeply enough onto their bodies.

[–] excral@feddit.org 16 points 1 week ago (4 children)

It's all based on a very fundamental mathematical law: if you increase the size of something, the volume increases with the third power while the surface area increases with the second power. An insect twice as large would be 8x as heavy and need 8x as much oxygen but 4x as much surface area.

That's also the reason why insects are as strong as they are. The strength of a muscle scales primarily with the cross section area of it, which again scales with the second power. So if you'd increase the weight of an ant by a factor 10,000,000 (e.g. 5mg to 50kg), the expected strength would increase by 10,000,000^(2/3) ≈ 46,400. If it could lift 10x it's weight at the original size, it could now only lift about 4.6% of it's weight

[–] Reddfugee42@lemmy.world 1 points 2 days ago

Square Cube Law

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[–] Anomalocaris@lemm.ee 13 points 1 week ago (8 children)

maybe once I have money for hobbies, but I really want to make oxygen rich terrariums, and selectively breed tarantulas to see if I can make them larger.

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[–] Atomic@sh.itjust.works 37 points 1 week ago (3 children)

Insects don't have lungs. It also means their potential size is directly limited by the oxygen content in the air.

Which is why we don't see cat sized insects roaming around.

[–] vaultdweller013@sh.itjust.works 15 points 1 week ago (5 children)

Which is why you don't see cat sized insects roaming around, I live next to a tarantula trail and some of them fuckers get BIG.

[–] Atomic@sh.itjust.works 2 points 6 days ago

Arachnids are not insects though.

[–] samus12345@lemm.ee 11 points 1 week ago* (last edited 1 week ago) (2 children)

Spiders aren't insects. Though like them, they don't have lungs! Not ones like ours, anyway.

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[–] LordOfLocksley@lemmy.world 33 points 1 week ago (2 children)

Huh, the Greek hero Spiracles saved the bees

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[–] hperrin@lemmy.world 28 points 1 week ago (4 children)

Hold on, wait a minute, pause. There are people who think that bugs have lungs?

[–] Remember_the_tooth@lemmy.world 34 points 1 week ago (3 children)

To be fair, while bugs and other insects don't have lungs, some arthropods do. The differences among arthropods, insects and bugs aren't exactly common knowledge.

[–] TomasEkeli@programming.dev 26 points 1 week ago* (last edited 1 week ago) (22 children)

some have book-lungs not true lungs. Only us fish have "true" lungs

edit: this thread turned into nerd-heaven. i love it!

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[–] Maalus@lemmy.world 15 points 1 week ago

It's funny that this is biology in 4th grade and half the people here are shocked

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[–] Alpha71@lemmy.world 27 points 1 week ago (1 children)
[–] AppleTea@lemmy.zip 70 points 1 week ago (3 children)

Not just bees, it's true of all insects.

Consequently, the amount of oxygen in the air determines how big bugs can grow. Get too big, and the oxygen can't diffuse into the body fast enough. This even shows up in the fossil records, with larger bugs being found alongside evidence of eras that had more oxygen in the atmosphere.

[–] Tlaloc_Temporal@lemmy.ca 11 points 1 week ago

They aren't insects, but most arachnids have book lungs, which are basically a pocket full of air gills.

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[–] woodenghost@hexbear.net 26 points 1 week ago (1 children)

It's what limits their size. If insects had lungs, they could get larger. 300 million years ago, when the oxygen content in the atmosphere was temporarily higher, there were huge dragonflies with 75 cm wingspan (2.5 ft).

[–] manny_stillwagon@mander.xyz 17 points 1 week ago

In the original Jurassic Park novel by Michael Crichton, one of the animals they've cloned are these giant dragonflies. Its only one line in the book (Tim, one if the kids, sees one fly by and recalls reading about them) but it caught my attention as just straight impossible. I remember thinking, "Unless you're somehow controlling the oxygen level of the air around this entire island, there's no way that bug can't breathe."

[–] MyNameIsIgglePiggle@sh.itjust.works 17 points 1 week ago (1 children)

Well that's a Christmas spiracle

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[–] NoOutlinesBand@lemmy.world 15 points 1 week ago

"I've been trying to quit smoking. I want to take better care of my spiracles"

[–] match@pawb.social 15 points 1 week ago (1 children)

they don't have circulatory systems either they've basically just pushing things through themselves and tryna make it work

[–] Remember_the_tooth@lemmy.world 24 points 1 week ago

Pedant here. They absolutely do have circulatory systems. They have what's known as an open circulatory system, whereas we have a closed circulatory system.

[–] Wilco@lemm.ee 11 points 1 week ago

Wait until this person hears about fish.

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