and counting... 23. Tall. Curious. Coffee, chocolate, dulce de leche, the rain, naps and horror movies lover. Normal, Tumblr normal.
PS.: There can be so many mistakes in here.
Vasculature of a 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.