Coughing in the theater is not a respiratory ailment. It is a criticism.
Laughing is also good for your respiratory system.
Without the EPA and the national pollution safeguards it enforces, more children would have asthma. Our water would be less safe. More chemicals would poison our bodies. And more people would die prematurely from respiratory diseases and heart attacks.
The respiratory mechanisms of birds are definitely adapted to the function of flight, as evidenced by the fact that birds which do not fly (Apteryx, Penguins) show these adaptations in a greatly reduced form.
There can be little doubt that fishes swimming rapidly do not make respiratory movements at all, but obtain the necessary ventilation of the gills simply by opening the mouth.
First developed as a weapon by the U.S. Army, VX is an oily, odorless and tasteless liquid that kills on contact with the skin or when inhaled in aerosol form. Like other nerve agents, it is treatable in the first minutes after exposure but otherwise leads swiftly to fatal convulsions and respiratory failure.
Millions of people with respiratory diseases have relied on oxygen equipment, delivered to their homes, to help them breathe.
Ebola isn't a respiratory virus. It doesn't spread through the airborne route. So it's not likely to spread like wildfire around the world and kill tens of thousands or hundreds of thousands of people. That's what I think of as the next big one.
Ever since then, all descendant vertebrates have had the forward end of the digestive system and the forward end of the respiratory system very much involved with each other. This manifests itself in the human body with a crossing of the two systems in the throat.
Trees are our closest relatives. What trees exhale, we inhale; what we exhale, they inhale. They are half our respiratory system.
