Krsna's sportive activity (lila) in Gokula, the region of the respiratory acinus, is his conscious intervention that manifests through the operation of the components of this region of the lungs, primarily the respiratory bronchioles (cows), their innervators (the milkmen, gopas) and the arterioles of the bronchial (gopis) and the pulmonary systems of circulation.
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Scientific facts are used to construct a mystical landscape. The respiratory bronchioles are taken to be the cows giving the milk of oxygen molecules. Similarly the crops represent the capillaries.
The "grass" that the respiratory bronchioles (cows) feed on is surely the capillaries. These are the capillaries on the pulmonary arterial side carrying the deoxygenated blood. These perform a nutritive function, as it were, for the cows as the carbon dioxide inherent in this flow is ingested as it were by the respiratory bronchioles. The milk obtained from these cows is of course the flow of oxygen molecules streaming forth from the udder (lumen) of these conduits.
The alveolar sac on which grows the grass (capillaries) for feeding the cows (respiratory bronchioles) is without doubt the hill named Govardhan. The respiratory bronchioles enter into this "hill" for "grazing". The alveolar sac is a grazing ground for these "cows," as it were.
Indra sends down "rain" -- the flow of deoxygenated blood -- on this "hill." This hill may be viewed as resting on the little finger of Krsna. This seems to be again (as in Vamana's toes) a reference to the virat purusa. The respiratory bronchioles of the upper region of the lungs seem to be mapped to the fingers of virat (as these are the extremities):and as these support the alveoli and as Lord Krsna is the creator of the virat purusa and his conscious power manifests through it, therefore it is in a way Krsna's little finger that supports Govardhan.
