I get the same thing with any form of biological 'inside', but outsides I"m usually fine with. Hand drawn depiction of how nasal cavities work? Eugh, dizziness and instant relation to my own gaping head.

Bug shots, bug squishing, blood in movies? Squished brain etc.? All good to most degrees.

I pass out during 2D animation demonstrations on how bodies work.

I pass out during nasal allergy tests. I can't imagine how I'll go with a covid test.... pass out most likely.