Nanites are very small particules that fills the neurocomputers of HMEs/Post-Humans. In those neurocomputers, they represent both the actual neurons but most importantly they do the jobs of the synapses. Those microscopic robots are so tiny, it feels like a heavy liquid when you hold a bunch in your hand, not like an actual pile of metal.
If you take some nanites out of a neurocomputer, you can get a few informations on where it comes from: it usual holds the ID of the said computer, but it might also hold the last "thought" it had, which can be a huge indicator. Unforunatly, this can also be true for Viruses, such as the Corruption. This why singers are so dangerous: their nanites, even outside of their shell, stay active and use the energy of their next victim's body to be able to crawl into the HME drive and infect new people.
Impressively enough, another type of nanites, developped by D.D. program 02, is found in the cryogenic gel used to keep the cells fed: they are their in small quantities to collect data on the state of the body: nutriments, oxygen levels, Cell deterioration... Thus giving all the informations you get on the cryopod screens.
Other than that, well. Nanites are nanites. Their isn't much more to say about them. It's a bit like our blood really, or at least what comes the closest to it. It's not organic, but it works a lot like that. Try not loosing to much though, as that will affect your neurocomputer's abilities. You won't loose your memory, as that's in your drive, but speed wise, this could cause quiet a lot of damage... This article will be edited as soon as Summer camp will be other!!!