Heart

ok Ive modeled a heart and im trying to find out how to texture it with veins gouing through it
and stuff without having to model them, could any one help me out?

here it is
http://images7.pictiger.com/thumbs/64/7f0933cfadc9cd14979e0ad1b4d73164.th.jpg

http://wiki.blender.org/index.php/Manual

UV maps and bump maps.