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(a) Front view. Heart and lung Head zones in red. Heart channel: thick green line shows external pathway; dotted green line shows the internal pathway. Pericardium channel: thick yellow line shows the external pathway; dotted yellow line shows the internal pathway. The acupuncture points with therapeutic indication for heart or lung are highlighted. (b) Posterior view. The acupuncture points with therapeutic indications for heart or lung in the area are highlighted.
