At which anatomical location do all yang channels except BL cross?

The correct anatomical location where all yang channels except for the Bladder (BL) channel cross is the supraclavicular fossa. In Traditional Chinese Medicine (TCM), the supraclavicular fossa is significant because it serves as a major point of convergence for various channels, particularly the yang channels, which are responsible for energy (Qi) and blood circulation.

The other locations listed do not serve as common crossing points for all the yang channels. The diaphragm primarily relates to the boundary between the thoracic and abdominal cavities and does not function as a channel crossing location. Ren 3, located on the abdomen, is primarily associated with the lower burner and is not a crossing point for the majority of the yang channels. SP 6, located on the lower leg, is known for its association with the spleen, liver, and kidney channels but does not pertain to the crossing of all the yang channels.

Understanding the significance of the supraclavicular fossa in TCM theory and practice helps in navigating the complexities of channel interactions and their application in acupuncture treatment.