Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.

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The human body is a watercooled biological machinery (lemmy.world)

submitted 4 months ago by Dremor@lemmy.world to c/showerthoughts@lemmy.world

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[–] Deadrek 42 points 4 months ago (1 children)

We basically run on tiny combustion engines. Exothermic reactions.

We aren't a passive 98 degrees, we would be hotter if it wasn't cool enough outside. Higher heat would cause different cellular structures to become misshapen, leading to system breakdown. I'd be like trying to run a cpu cooling loop with boiling water.

[–] Dremor@lemmy.world 12 points 4 months ago* (last edited 4 months ago) (1 children)

And I'd add to that that if our thermal dissipation is overwhelmed, our internal heat build up. To do that heat dissipation, we need to have an environment that suck out more heat out of us than what we produce. If the environment is too hot, the heat build up and as Deadrek says, our internal inner workings beak down.

That why we sweat. Water suck out a lot more heat than air, because it wants to saturate the ambiante air, and to do that it suck up our body heat to become steam. Rince and repeat (literally).

But once the air is to humid, it gets more and more difficult for our sweat to evaporate, which makes it ineffective. That why we can kinda survive in a 90°C + sauna (albeit not for long, but for a different reason), but not in a 37°C (98°F) 100% humidity place like some tropical rainforest. At least, not without specialized acclimatation and survival techniques.

[–] LustyArgonianMana@lemmy.world 2 points 4 months ago (1 children)

There's actually theoretically an endothermic reaction we do. E coli can undergo an endothermic reaction if it has enough zinc. It's entirely possible this is why we have an appendix. I'll link studies if anyone is interested

[–] Dremor@lemmy.world 3 points 4 months ago* (last edited 4 months ago) (1 children)

Link it, I'm always up for some

Science!

[–] LustyArgonianMana@lemmy.world 3 points 4 months ago* (last edited 4 months ago)

Sure. Please note that an official metastudy proving this has not come out, so you'll have to do some dot connecting yourself.

"Thermodynamic Studies of the Mechanism of Metal Binding to the Escherichia coli Zinc Transporter YiiP" https://www.sciencedirect.com/science/article/pii/S0021925819755392

As shown in Fig. 2A, Zn2+ titrations began with an exothermic heat reaction, which was followed by a late endothermic reaction. This characteristic exothermic-to-endothermic transition suggests the presence of at least two sets of independent Zn2+ binding sites, accounting for the exothermic and endothermic heat reactions, respectively.

"Association of Appendicitis Incidence With Warmer Weather Independent of Season" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9530968/

Findings of this study suggest that the incidence of appendicitis increases when the temperature increases, independent of season.

"Association of the Bacteria of the Vermiform Appendix and the Peritoneal Cavity with Complicated Acute Appendicitis in Children" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10252422/#:~:text=Bacteria%20identified%20in%20the%20lumen,in%20uncomplicated%20and%20complicated%20appendicitis.&text=Escherichia%20coli%20%2B%20Streptococcus%20spp.&text=Escherichia%20coli%20%2B%20Streptococcus%20spp

Escherichia coli was the most commonly identified microorganism in the appendiceal lumen (83.4%; 34.7% as a single entity)

E. coli was found in 76.2% of the cultures of the appendiceal lumen in patients with uncomplicated appendicitis (35.7% as the only pathogen) followed by P. aeruginosa (21.5%) and K. pneumoniae (14.3%) (Table 3).

E. coli was also the predominant microorganism in complicated appendicitis (96.4%; 63.1% of them in combination with other bacteria).

"Metabolic analysis of acute appendicitis by using system biology approach" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6347980/

As it is appeared in the table 2, concentration alteration of other metal ions such as sodium, zinc, and potassium are related to appendicitis

"Zinc intake ameliorates intestinal morphology and oxidative stress of broiler chickens under heat stress" https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2023.1308907/full

Our findings indicated that dietary Zn supplementation significantly increased the feed-to-weight ratio of broilers during the experimental period under heat stress.

Basically, not only should we all be supplementing with zinc during hotter months, but also this has indications for the purpose of the appendix and possibly a way to make air conditioning out of our feces.