Blood and brains, artificial and evolved
IBM is working on blood for computers, as a possible key to future computing density. They want to eliminate air-flow space and power cabling by using a liquid that delivers both power and cooling to components that then can be more tightly packed. If they add in a molecular bus as a control path and for internal state information, future robots will have hormones, too.
Researchers at the Allen Institute for Brain Science found a surprisingly narrow range of genetic expression in human brains, much smaller than might be expected from the amount of genotype variation. (Cite.)