Source: The San Tan Valley, AZ weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency).
A hydra is a small multicellular organism in the genus of the same name. These tiny animals are found in fresh water all over the world, and they have a number of distinctive traits that make them interesting to scientists.
Hydralazine (hye dral' a zeen) is a phthalazine derivative and antihypertensive agent which acts by direct relaxation of arteriolar smooth muscle, probably by alteration in intracellular calcium signaling.