Concept-Mapping Skin-circulatory system

I have used this concept in my work before, looking at skin as a kind of map. Little scars, bruises, moles as markings on the landscape that change over time, some permanent, wrinklier as you get older. Looking at tattoos, especially those cool sailor style ones they're so naff.
I really want to work with the floor space because i see maps as being a flat diagram from an aerial view. I have thought about mapping the system of veins and arteries inside the human body, using something to translate this onto the floor. I want to make it interactive somehow, could sort of animate the veins and draw little pictures in the style of the sailor tattoos and make it almost like a child's road map for matchbox cars. The names of each artery could go inside the banners of the heart pictures etc, and i could research the function of the artery and the body parts it relates closely to and draw symbols and pictures to go with these. BUT i can't think of any sort of digital media that i want to use to make this, i thought about knitting it because i have been looking at craft/high art in my gender studies lectures and think why not use wool?? It's only rendered kitsch because it is female art/craft whatever.

It would be awesome if i could carve the veins directly into the floor and have liquid running through it and out down the stairs onto the footpath, but have the grooves deep enough so that it didn't get on your feet when you walked over it. This would be a cool way to represent it but i don't know what relevance it has to anything... the source of the 'blood' could be from things we use to fuel our bodies, say animals and meat eating, even though i am not vegetarian/vegan at all. You could have animals dripping the red liquid that flows into the circulatory system, the amount that flows out could somehow be determined by the viewers???