Known as the 'Minister of Reception', the small intestine receives partially digested food from the stomach and further refines it, separating 'the pure from the impure', then assimilating the purified nutrients and moving the impure wastes onwards to the large intestine for elimination. Associated with the heart by Fire energy, the small intestine controls the more basic emotions, as reflected in the Chinese term "duan chang" ('broken intestines'), which is equivalent to the English term 'broken heart'. Its energy meridian runs into the head, where it influences the function of the pituitary gland, the 'master gland' whose secretions regulate growth, metabolism, immunity, sexuality, and the entire endocrine system.
Passage with points
The meridian starts from the ulnar side of the tip of the little finger (SI 1) follows the ulnar side of the dorsum of the hand reaches the wrist emerges from the styloid process of the ulna from there ascends along the posterior border of the lateral aspect of the forearm passes between the olecranon of the ulna and the medial epicondyle of the humerus runs along the posterior border of the lateral aspect of the upper arm up to the shoulder joint circles around the scapular region meets DU 14 on the back turns downward to the supraclavicular fossa ascends to the neck and further to the cheek via the outer canthus enters the ear.
The branch from the neck runs upward to the infraorbital region and then to the lateral side of the nose reaches the inner canthus, where it links with the urinary bladder meridian.
Passage without points
The branch from the supracalvicular fossa enters the chest to connect with the heart from there descends along the esophagus passes through the diaphragm reaches the stomach finally enters its pertaining organ the small intestine.