The materials donated for the Mishkan correspond to the components of the human being. "Gold" is the soul; "silver," the body; "copper," the voice; "blue," the veins; "purple," the flesh; "red," the blood; "flax," the intestines; "goat hair," the hair; "ram skins dyed red," the skin of the face; "tachash skins," the scalp; "shittim wood," the bones; "oil for lighting," the eyes; "spices for the anointing oil and for the sweet incense," the nose, mouth and palate; "shoham stones and gemstones for setting," the kidneys and the heart.
Midrash HaGadol