What gases are expelled from animals?

Numerous gases are expelled from animals, but one gas of interest might be methane.

Most animals breathe in oxygen and out CO2.

In the digestion process many produce methane due to incomplete digestion. Ruminants are famous for this. Foods containing sulfur can produce mercapitans and hydrogen sulfide in digestion creating a pungent aroma.

Rap

If ya kill 'em and let 'em bloat up in the hot sun, they produce another interesting array of gases.

Don't get too close . . .

Thanks. I expected methane to be high on the list. But is methane expelled from either end? I can light a fart but can I light a burp?

I'm dredging up a news story from several years ago here, but I seem to remember something about cow burps containing methane. I wouldn't think human burps were big on methane. They generally occur during or just after eating or drinking. Not much digestion could have taken place. I think we're just getting rid of air that sneaked in during the process.

I did think, as soon as I saw this thread title, that Wilso was the man to provide expert guidance.

I don't know whether this in an individual experience of an unverifiable nature but a young lady once burped a depth bomber on me when I was French-kissing her after she had eaten a meat-and-potato pie on top of a skinful of larger and I don't know a breakdown of what it was scientifically but it was, to my taste, rather unpleasant.

I resolved to take up tennis and ballroom dancing as a result.

So what determines the presence of methane in a burp? Size of the animal or type of digestive system? Or something else?

arti wrote-



Try eating some fresh cow-****. It's a piece of cake.

I had an afterburner installed years ago, so all I produce is carbon dioxide and water.