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an atmospheric gas made of three oxygen molecules bonded together (O3).
the main blood vessel that returns deoxygenated blood from the head and thorax to the right...
an infectious disease that can be spread or transmitted from one person to another.
secretory tissue in the leaves of plants that secretes water through pores in the epidermis or...
unable to notice or respond to things that you would usually be aware of through your senses....
chemicals used as the propellants in aerosol sprays, as coolants in fridges, air conditioners...