Ask HN: Are there any projects that attempt to simulate the human body?

It doesn't need to have anything close to cellular precision. I know how hard it is to simulate even just a few million neurons and synapse. I'm looking for something that simulates high-level processes that can be found in medical research papers. Even a crude weight loss simulator given calories, physiological traits and exercise level buckets would qualify.

Non-human simulations, like mice, worms, flies, yeast, might also qualify if they can be adapted to humans.