If the inner lining of the air sacs neither thin nor highly vascularized, then it can be inferred that AIR SACS ARE CANNOT BE THE SITES OF GASEOUS EXCHANGE BETWEEN AIR AND BLOOD. Air sacs are generally lined with mucus and surrounded with blood capillaries.
In case of birds, air sacs play an important role in respiratory system.
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
UV rays reacting with the O2 molecules
I might be wrong a little but
Hope the helps :)
Answer: Osmosis Jones is a 2001 part animated, part live action film whose title character is Osmosis Jones, a white blood cell who takes on a deadly virus.
