A symbol with many levels of meaning. These are only a few of them:
Historical: ”Do not forget that Adam is not one man, neither is Eve one woman. Indeed, Adam is all of the millions of men of Lemuria, and Eve is all of the millions of women of Lemuria.” - Samael Aun Weor, The Revolution of Beelzebub
1) Physical: Adam represents the brain and Eve represents the sexual organs
2) Ethereal: Adam and Eve symbolize the two canals that entwine around the spinal column.