I think you can similarly reduce humans. For example, all humans do is contract muscles. This doesn't fully cover all of biology, such as replicating cells, etc. so not exactly comprehensive, but hopefully that helps get the idea across.
LLMS: Receive text/binary input, process it, and output text/binary input
Humans: Receive various inputs, process them, and output muscle contractions
I think you can similarly reduce humans. For example, all humans do is contract muscles. This doesn't fully cover all of biology, such as replicating cells, etc. so not exactly comprehensive, but hopefully that helps get the idea across.
LLMS: Receive text/binary input, process it, and output text/binary input Humans: Receive various inputs, process them, and output muscle contractions