Tooth #12 - First Premolar

Meridian
large intestine
Organs
Interactive Meridian Tooth Chart App - left large intestine
left large intestine
Interactive Meridian Tooth Chart App - left lung
left lung
Interactive Meridian Tooth Chart App - liver
liver
Interactive Meridian Tooth Chart App - pancreas
pancreas
Interactive Meridian Tooth Chart App - stomach
stomach
Glands
thyroid, posterior lobe of the pituitary gland
Vertebrae
C5, C6, C7, T3, T4, L4, L5
Spinal cord Segments
C5, C5, C7, T2, T3, T4, L4, L5
Sensory
ethmoid cells, eye, maxillary sinus
Musculature
upper & lower extremities, trunk
Joints
big toe, foot, radial hand, elbow, shoulder
Other Relationships
ablatio retinae, agrypnia, cell respiration, descending colon (upper) & traverse colon, diseases of the ocular fundus, dysbiosis, dyspepsia of the liver-stomach pancreas, dysthyreosis, enzymatics, eye diseases, fermentation, maxillary sinus, mental varieties, schizophrenic aspects, vegetative dystonia.

The key positioning of the 4ths is similar to the 8th.