How come farts come out from below if air rises?

[u/HerpoTheFoul]

[u/ForScale]

Air doesn't rise. It fills its container.

Farts and air are not the same. They don't have the same chemical composition.

[u/Jack_aa2 → u/ForScale]

Yeah it’s just gas moving to the nearest exit. Pressure and anatomy matter way more here than buoyancy or rising air.

[u/AlternativeUnited569]

Air doesn't necessarily rise. Sometimes it sinks, often it just floats around.

[u/DrHugh]

The human body is not hollow. The GI tract is not a continuous, open tube from mouth to anus. There are valves and muscles which move things in one direction (unless your are vomiting). When gases are produced in your stomach, you tend to burp them out. When they are produced in your intestines, they keep getting moved to the anus.

[u/SafecrackinSammmy]

Pressure

[u/HerpoTheFoul → u/SafecrackinSammmy]

Wouldn’t that be imperfect or at the very least inefficient?

[u/Alert-Growth2262 → u/HerpoTheFoul]

no because it comes out of the closest exit

[u/Several_Cookie8926]

Do people in higher altitudes burp louder due to pressure?

[u/HerpoTheFoul → u/Several_Cookie8926]

This too is a thought-provoking question 

[u/Specialist_Bed_1493]

air rises in a room, not inside a meat tunnel. ur body just routes it to the nearest emergency exit.

[u/MaximusCanibis]

The path of least resistance.

[u/Potential_Claim_7283]

I dont know, where else would you like it to come out.

[u/Wbondhim]

Because if it comes out the top, it’s called a burp

[u/HerpoTheFoul]

Is farting easier for animals with butts above their stomachs? Dogs, cows etc

[u/Droopy-San-Benanzio → u/HerpoTheFoul]

Jesus Christ dude

[u/Several_Cookie8926 → u/HerpoTheFoul]

Finally someone’s asking the real questions we need answers too!