In Soldat/Sparks-gfx:
blood.bmp - large blood splatter (main concentration of blood)
lilblood.bmp - a single drop of blood (drips from the player when injured)
splat.bmp - less concentrated blood splatter that sprays off of a wall when blood hits it
The images in Soldat/Gostek-gfx/Ranny are transparent over-lays of the body parts which become more visible as the player gets more injured each one applies to the body part of the same name in Soldat/Gostek-gfx
(the same principal applies for the images in Soldat/Gostek-gfx/Team2)