wmaxt said:
I belive a fuel "Cell" is lined with a compound to make it self sealing/more resilient to leakage while a welded metal tank is just that a "Fuel Tank". Not trying to be nitpicky but at this level of discussion its an important destinction.
wmaxt
You're on the money wmaxt - cells are also intergrated into the structure as a wet wing and can even include a "bag" which is attached to the structure.
When I was 25 years younger and 30 pounds thinner I was a fuel tank (or cell) inspector...