Tallest Building in Nevada. Stratosphere Tower, measuring an impressive 1,149 feet high, is the tallest observation tower in the United States. It is the second tallest in the Western Hemisphere, after the CN Tower in Toronto, Ontario. The 113 story tower is part of Stratosphere Casino, Hotel & Tower Complex in Las Vegas, Nevada. Its two year construction was set back by a both a fire and a lightning strike. The building was completed in 1996.
Excretion is the process by which metabolic wastes and other non-useful materials are eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell.
Excretion is a general term referring to the separation and throwing off of waste materials or toxic substances from the cells and tissues of a plant or animal. The separation, elaboration, and elimination of certain products arising from cellular functions in multicellular organisms is called secretion.