5 ms·

It's unclear how a brain would run without blood.

• niels_olson 11y ago
  Diffusion. Oxygen levels in tissue are about 3%, compared to 20% in the atmosphere. In fact, that was quite a finding back in ... the late 80s I think: they could coax fibroblasts to divide many more generations simply by incubating them in a low oxygen environment. Free radicals are brutal.