How do dragons breathe fire?

Answer 1

There are many theories, scientifically being flint in a pouch in their mouths that roll and spark, creating fire. Here's a theory that I value highly: We eat our body by digesting it created methane, CH4, however dragons store the gas in a 'lung' and that serves as a bag for it, then it's mixed with a small amount of phosphor, P4. That's got the stuff to ignite in fire at the contact of air, so when the dragon wants to breathe fire, the methane goes into the lung and then, when the gas is in the air, the phosphor ignites and puts the methane in fire. Confusing enough?!? But it's sensible.

Answer 2

Dragons and fire breathing Dragons are a mythical creatures made up for stories and fairytales by many cultures and religions around the world, there are no real Dragons especially the fire breathing types.

All members of class Hexapedal have five lungs - just the system that their particular ancestral lungfish developed. In the second immigrant invasion the flying form that made it off of Vorcaic had a sticky saliva - something it used in making its nest (much like swifts and swallows do). Some members then began to use this as a noxious defense by spitting it at intruders (much like camels do.)

In developing this ability the dragon preferentially employed the dorsal lung as the propellant chamber as it had the foundation of the spine and optimal constriction from the diaphragm. As the dragon has five lung it had no problem in reserving one for this particular purpose. As this lung was not needed for respiration it began to fill-up with phlegm and became a reservoir for excreta in particular heavy-metals (which the Hexapedals have particular resistance to.) By the time of the Weir-dragons this lung was completely fluid filled and was being assisted by the other lungs in making a aerosol.

As fluids are less compressible than air the projectile ability of the Weir-dragons was considerable and aiming was assisted by flapping of the wings. By the time of the Sore-dragons this fifth-lung fluid was acquiring several highly nitrated poisons. The high heavy-metal concentration of the fluid (only present when the dragon is in a environment rich enough to build them up) tended to decompose the rather unstable nitrated compounds so (by necessity) the fifth-lung started to become a heavy-metal free zone.

When a dragon is exposed to a heavy-metal contaminated diet it excretes the excess from their scales and, in the case of the higher drags, throat plates. Therefore when the higher Sore-drags used their poisonous spray there was a tendency for them to begin thermal decomposition as they came in contact with the throat plates. The Langdorigan Sore-drag is described as having hot asphalt or napalm-like spittle. From here it is rather simple to see how the true fire-dragons developed their fire-breath ability. It should be noted that truly firm evidence on these animals is scanty as they are difficult to approach and study.
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Answer 3

Dragons have 5 lungs. The most dorsal one of the collection has become a specialty organ that produces a highly nitrated phlegm. When this phlegm is expelled and comes in contact with the heavy metal contaminated plates in the throat the liquid ignites.

Answer 4

The heart creates elemental energy which diffuses into the blood. This energy-rich blood travels to the fundamentum, which is an organ unique to dragons. It takes the elemental energy from the blood and pours it into the upper part of the dragon's stomach. Part of this energy is used in digestion, but the majority of it is breathed out of the dragon as fire.

All member of Class Hexabrachia after the lung-fish stage have five lungs. In the Weir-dragons, Sore-dragons and True (fire-breathing) dragons, the most dorsal of these lungs has developed into a accelerate producing organ. This accelerant is expelled in mist form on the dragon executing a special cough reflex. The special metallic 'teeth' in the back of its throat catalytic-ally ignite the accelerant into the famous fire breath.