An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
Dioxygen,Oxygen-16,Oxygen 16
D006801
Humans
Members of the species Homo sapiens.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000388
Air
The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.
D000860
Hypoxia
Sub-optimal OXYGEN levels in the ambient air of living organisms.
A sudden loss of pressure in a pressurized cabin, cockpit, or the like, so rapid as to be explosive. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)