Description A quick labeled sketch of dragon wing anatomy, showing pulmonary sacks in the wings (which are fed by the heat from the flame creating intestine & excess breath) as well as other interesting anatomical bits. Update 8/21/09 Wow. This has taken off (no pun intended) and I only meant to do a ref sketch for me. Well. I may have to do a cleaner one. Glad y'all like, though.