The real part is the soul

"Believe not that man consists solely of flesh, skin, bones, and
veins. The real part of man is his soul, and the things just
mentioned, the skin, flesh, bones, and veins, are only an
outward covering, a veil, but are not the man. When man
departs he divests himself of all the veils which cover him.
And these different parts of our body correspond to the
secrets of the Divine wisdom. The skin typifies the heavens
which extend everywhere and cover everything like a garment.
The flesh puts us in mind of the evil side of the universe. The
bones and the veins symbolize the Divine chariot, the inner
powers of man which are the servants of God. But they are all
but an outer covering. For, inside man, there is the secret of
the Heavenly Man. . . . Everything below takes place in the
same manner as everything above. This is the meaning of the
remark that G-d created man in His own image. But just as in
the heavens, which cover the whole universe, we behold
different shapes brought about by the stars and the planets to
teach us concerning hidden things and deep secrets, so upon
the skin which covers our body there are shapes and forms
which are like planets and stars to our bodies. All these
shapes have a hidden meaning, and are observed by the sages
who are able to read the face of man"
 
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