Vasculature of a porcine heart.
This is the vasculature of an actual heart (porcine heart, identical to human heart). The blood is replaced by a plastic substance which fills all of the veins, capillaries, etc, then the heart is put into a solution that dissolves all the tissue, leaving this incredible detail of a heart.
(Source: c-r-y-i-n-g-s-o-u-l-s)
(Source: ddumbbitch, via macabre-mickey)
(Source: manicpanic69, via narcotic)
(via articulomortis)