A novel 2023 hypothesis proposes that the twelve meridians are organized around the distribution of , with acupoints representing the basic structural and functional units of this system. This remains speculative but highlights the ongoing search for a biological basis for meridians .
Meridian coordinates, commonly known as lines of longitude, are imaginary semi-circles running vertically from the North Pole to the South Pole. Unlike lines of latitude, which are parallel and vary in length, all meridians are equal in length and converge at the geographic poles. Key Characteristics meridian coordinates