[FactoryReboot]

“Every organ is the most complicated organ”.

No, that’s blatantly untrue. The liver is one of the simpler ones as it’s all single cells, and the brain is definitely the most complex. I’ve never heard anyone say they are equally complex.

That doesn’t mean we understand everything about the liver, but we are hell of a lot closer than the brain.

[knaik94]

The liver itself might be simple but the complexity is in the enzyme pathways. The marker of "elevated liver enzymes" doesn't tell us much.

Taking a step back, there is only one organ I will admit we understand better than the brain, the heart. It's the only organ where we know enough to replace it with a mechanical counterpart. We don't know enough to make it last a long time, but it's enough to prolong someone's life in a meaningful way.