The occult significance of Aquarius is knowledge. Aquarius, the sign of the water bearer, is an eminently revolutionary sign. There are four types of knowledge or secret science. We need to know what these four types of knowledge are.
Upper limb. The upper limb or upper extremity is the region in a vertebrate animal extending from the deltoid region to the hand, including the arm, axilla and shoulder.
The one at the top of the esophagus is called the upper esophageal sphincter (UES) and the one at the bottom of the esophagus (which separates the esophagus from the stomach) is called the lower esophageal sphincter (LES). The area in between is known as the body of the esophagus.