cHesHiRe_CaT_0013
AH! It's you! 8D
that is right... i should know that since i studied the nervous system... it has to be some type of circulatory system that zombie virus created or is using to keep it alive lol
Well, no, not really. There no real reason for the body to actually be alive, period (and the point of zombies is that...they aren't alive ~.~ )
The most logical argument for zombies to exist, that I have found, are the following:
Injected into the bloodstream (note: bloodstream, not nervous system), is a combination of specialised drugs/posions: the first being a TTX, a fatal nuerotoxin found in the pufferfish, the second being an hallucinogen, like datura (from the Angel trumpet). It induces a psychotic state, wherein the person seems to be reanimated (placed into a death like coma via the TTX, then buried, then dug up and "reanimated"/woken via the datura). It puts the person into a compliant state through which they can be controlled. This is not a true case of "modern" zombies, more a look at induced psychosis.
The other option is the "newly" discovered fungus in Brazil that turns ants into "zombies". Ophiocordyceps unilateralis attaches to the head of an ant (and can shoot out spores to any passing ants, to also grow a fungus within them), then directing the body to a leaf, twig, etc where it makes the ant attach itself, before killing the ant. It then grows within the ant (that is providing a nursery like environment for the fungus) and spreads. Then it starts the process again - it sends out spores, they grow in other ants, etc, etc.
So, as we can see in the second example, where the ant is clearly dead, there is no need for nutrients. The body is no longer important, rather it is just a host from which the virus/disease/fungus spreads. The important part is the breeding and spreading of the virus/disease (in modern zombies - via blood/biting/etc), the host is incidental. Thus, there's no need for the body/host to receive any nutrients at all, just for the virus/disease/fungus to get what is needed to incubate, grow and spread.