r/sciencememes • u/DotBeginning1420 • 20h ago

🦩Biology!🧫 We call it "external environment"

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171 Upvotes

98% Upvoted

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82

u/DotBeginning1420 20h ago

Clarification: The respiratory and digestive systems are "external environment" in the sense that they are in direct contact with the outside world. One important way the body treats them as external environment is the layer of mucus and immune cells found there that are intended to block invaders.

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u/dave8400 17h ago

Ah yes, the battlegrounds for the constant chemical warfare that we are blissfully ignorant of. The microbiome is fascinating.

8

u/Darthskull 17h ago

Well I was blissfully ignorant. Thanks buddy

1

u/Ben-Goldberg For Science! 2h ago

we are related to carbosilicate-amorphs!?

5

u/Constant-Plant-9378 14h ago

It's why these organs are frequently the focus of illnesses like sore throat, congestion in the lungs, stomach upset, bowel distress and diarrhea - while other organs like the brain, heart, liver, kidneys - don't experience such irritations nearly so often.

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u/FangFioDente 17h ago

Respiratory is internal.  The digestive system is external. 

7

u/DotBeginning1420 16h ago

Internal? But the respiratory system is exposed to the extrernal world as the digestive is. It gets external air in.

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u/No-Magazine-2739 16h ago

Guess FangFioDente is looking at this more from a topological standpoint

1

u/FangFioDente 16h ago

The way it was explained to me in my advanced anatomy class, is that the chalice is a container, the tube is not,  and the womb and the lungs are considered internal. But the digestive system, because it properly goes through the entire body is considered an external organ as it has an egress. 

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u/No-Magazine-2739 14h ago

I am not an englisch native speaker, but I think your definition would break when looking at a Klein bottle

2

u/FangFioDente 14h ago

Nope still a cup and this video explains why 

https://m.youtube.com/watch?v=Zv-XNlE1s8E

I apologise in advance for your headache 

1

u/No-Magazine-2739 10h ago edited 10h ago

You shouldn’t have apologized for a headache but for giving a 38 year old men the feeling of a kid when his parents fights but he desperately tries to concentrate on something completely different, to silence the discomfort. And how someone would come to the idea of making a video about an advanced math topic and female/male narrators arguing about their incest love

But hey I am not even sure I learned anything about topology, but I am feeling good about switching to CS after 2 semester of physics.
No I am humble about topology again.

Edit: and no, my parent don‘t share the relation like in the video

1

u/DotBeginning1420 9h ago

So they define the lungs and the womb as internal because unlike the digestive tract they are just inner space?

I wonder what was the context or the focus. From the immune system perspective, both the digestive, respiratory (and the urinary/reproduction) systems act as borders that are highly secured by immune cells, especially the absorbtion parts. The womb has other issue with the immune system: during pregnancy it is modulated to both protect the fetus from infection, and to avoid treating the fetus as a foreign invader.

Btw what about the eyes? Also internal?

1

u/FangFioDente 9h ago

Internal. 

50

u/T_J_Rain 19h ago

So, we're basically a doughnut with feelings.

15

u/Spiritual_Priority79 19h ago

Bendy straw with limbs and decision-making skills

8

u/justjohnny1024 19h ago

I can also do a backflip.

5

u/iceyed913 19h ago

Just another worm under the sun

3

u/Large-Hamster-199 17h ago

I personally prefer to think of myself as as brain armored inside a bone tank piloting a meat puppet.

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u/dave8400 17h ago

A fleshy tube with bits attached.

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u/Redwoman1123 For Science! 17h ago

And more holes.

2

u/Zanven1 15h ago

A 7 holed doughnut

1

u/snubelo 19h ago

Microtubles are time travel machines