The colors are added in, of course, with it being an electron microscope image. Another picture:
this post was submitted on 14 Jan 2025
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See that little hook at the point? This is from penetrating skin ONCE.
This is why you don't re-use needles folks!
I can't believe it's that fine or how easily human skin can bend it. I guess our skin is a better protector than I'd given credit.
All these images are super interesting and I'm truly glad they got posted.
Holy shit. I noticed that too and thought that must be one of the ones that hurts going in, figured it was from when they draw the medicine into the syringe,. Or may e even from taking the cap off.
There are other reasons.
In that last one, you'd probably be able to see the bent over tip with the naked eye. You'd certainly be able to feel it if you ran your finger over it. It would take some force and would be pretty painful to use.