BODY ORGANS AND THE ANCIENT CULTURES.

Egyptian beliefs promoted some organs as representing an embodiment of some anthropomorphic principle. For example, the anatomical 'SMA,' symbol of larynx, trachea and lungs, represented the 'conceptual 'Central Pivot' around which 2 gods could unify Upper and Lower Egypt.'
The Book of the Dead vignettes portray early science, that is, weigh of the organs that are taken out of the corpse, during the development of mummification. It was done in order to be ritually weigh in gold and the god-king's heart be used for predictions to the future. The heart was then wrapped with amulets and, at the auspicious time indicated by the appropriate star rising as the ritual required, was re-inserted into the mummy for the final wrap. As every part of the body had a governing deity, spiritual reasoning ordained that the heart, together with the kidneys, needed to be re-attached inside the mummified body; while the liver, lungs, stomach and intestines be stored in 'sacred jars. The heart and kidneys provided for the deceased spiritual nourishment in the new journey via circulation of spiritual blood, and an outlet for elimination of subsequent spiritual fluid waste.
Egyptians had two different words for the 'heart,' and deemed it essential that this organ be inside the mummified body. Most Egyptologists belief that the heart was left in place because it was connected with the seat of the intelligence and will power. Hellenistic thought (400-300 BC) supported by the Hippocrates and Aristotelian located the intelligence of man in the left cavity of the heart.
The identification of the kidneys in hieroglyphs has presented a puzzle to scholars of ancient Egyptian medicine, and it seems strange that even the determinative sign is elusive. Egyptians had no specific words for kidneys, but plenty words for the brain; whereas the Assyrian medical texts contain no words for the brain, but many words for the kidneys. The Assyrians recognized the heart as the site of intelligence, while strength was to be found in the kidneys.
The Babylonians performed hepatos-copy, and extended their entrails prophecy to divination from the kidneys.
In the Hebrew Bible, Leviticus 3:4, animal's kidneys were used for fellowship offering: "The Aaronite priests shall throw the blood against all 4 sides of the altar and present the following parts of the animal as a food offering to the Lord -all the fat on the internal organs, the kidneys and the fat on them, and the best part of the liver. The priests shall burn all this on the altar along with the burnt offerings. The odor of this food offering is pleasant to the Lord."
The kidneys were believed to act as advisors in the spiritual realm, and thus subsequently guided the actions of the person's entire body, in both, physical and spiritual realms.
There are 30 mentions of kidneys in the Scriptures, in five instances, they are mentioned as the organs examined by God to judge an individual, and are cited with the heart as mirrors of the psyche of the person examined.