COMPOSITION OF THE ATMOSPHERE

COMPOSITION OF THE ATMOSPHERE

1. 14.7 psi at sea level

   • 1013.2 millibars
   • 29.92 in. Hg.

2. atmospheric pressure decreases with increasing altitude

3. NEED FOR ARTIFICIAL ATMOSPHERE

   • Air is drawn into the lungs by respiration and osmosis relies on the "partial pressure
     • The reduction of “partial pressure” of the oxygen causes hypoxia and anoxia
       • Hypoxia: a deficiency of oxygen, especially that extensive enough to cause impairment of the faculties.
       • Anoxia: an oxygen deprivation serious enough to cause death.