Coughing do not filters the air. Particles from air are deposited on mucus membrane of bronchial tree. But coughing takes out the particles deposited there.
Coughing while throwing up acts just like a gag reflex. Its there to help prevent Aspiration Pneumonia... which is inhaling something that isn't supposed to be inhaled like food, liquids, saliva and vomit virtually anything that isn't air. Coughing will help to keep it from getting into your lungs... its another defence mechanism the body has.
Inhaled air will be of ambient temperature. If the surroundings are warm, then inhaled air is warm. If surroundings are cold then inhaled air is cold.
Air inhaled through the mouth is not as clean as air inhaled through the nose. Reason for this is that when we inhale air through our nose than it get filtered by hair present in our nose. But air inhaled through our mouth goes directly in without any filtration.
Inhaled air is warmed and moistened in the nasopharynx and oropharynx.
The purpose of the sinuses is unclear, they may help to humidify the air we breath or they may enhance our voices.
Your nasal cavity is responsible for both moistening and warming the air that is inhaled. It is also responsible for filtering dust and other fine particles out of the air before they reach your lungs (that's what your boogers are.)
Exhaled air, which has a slightly higher amount of carbon dioxide, is heavier than inhaled air.
Exhaled air contains 16% oxygen and 21% when inhaled.
It has small dense hairs lining it that trap small debris, thus filtering the air.
In the lungs it's called cilium, plural cilia.
Exhaled air has less oxygen than inhaled air.Exhaled air has more carbon dioxide than inhaled air.Exhaled air is warmer that inhaled air.Maybe the first 2 are redundant, but I think that should work!
trees and all other plants help in some way by filtering out the c02 gas