A Jaina Source on Jambudvipa

The Buddhist and the Jaina traditions too seem to share the same Puranic micro-cosmography. Some Jaina sources, for example, talk of several “horizontal bands” separating Jambudvipa into identical northern and southern hemispheres. This can only refer to the two “hemispheres” of the right and the left lung. These “bands” refer to groupings of the three entities of the bronchus, the pulmonary artery and the pulmonary vein. The following excerpt is precious as it supplements and buttresses our conclusions regarding the identity of the cosmographical entities found in the Puranas:

The Jambu-Dvipa is divided into identical northern and southern hemispheres by horizontal bands of different widths formed by six main parallel mountain ranges running from the east to the west. The central band, containing Mt. Meru, is larger than the others, and is known as the region of Maha-Videha. On one side of Mt. Meru, excluding the regions at its base known as Dev-kuru and Uttara-kuru, is the land of eastern Videha and on the other side is the land of western Videha. (Indian Painting: Essays in Honour of Karl J. Khandalavala. P. 134) 

The "Central Band" contains the principal bronchus (Mt Meru)

 In the quote above, the six main mountain ranges that run from the east to the west (medially to peripherally?) seem to be the principal bronchus and the primary branches of the pulmonary artery and vein, three on either side. This triad may be said to constitute a “band” and as this triad courses through the lung, its width also changes as a result of the change in the width of the individual conduits. 

The region of Videha is the region of Meru, the principal bronchus. The regions at the base of Meru are said to have the names of “Dev-kuru” and “Uttara-kuru.” Now, we already know from our Puranic sources that the base of Meru is the Ilavrta region, containing the four “support” or “feet” mountains of Meru—Mandara and the rest. It is in fact four regions with four mountains (the secondary or lobar bronchi). On comparing these two descriptions one may conclude that “Dev-kuru,” which must be Bharata and “Uttara-kuru” refer to two of the four regions of Ilavrta. Therefore, if our assumptions are correct and if the Puranic cosmographer agrees perfectly with his Jaina counterpart, the varsa of Bharata in the Purana should refer to one of the lobar regions.