Specific gravity measures the kidney's ability to concentrate or dilute urine in relation to plasma. Because urine is a solution of minerals, salts, and compounds dissolved in water, the specific gravity is greater than 1.000. The more concentrated the urine, the higher the urine specific gravity. An adult's kidneys have a remarkable ability to concentrate or dilute urine. In infants, the range for specific gravity is less because immature kidneys are not able to concentrate urine as effectively as mature kidneys.
For the animated series, see Creepy Crawlers (TV series). Creepy Crawlers (or Thingmaker) is an activity toy made by Mattel, beginning in 1964. The toy consists of a series of die-cast metal molds resembling various bug-like creatures, into which is poured a liquid chemical substance called Plastigoop, which comes in assorted colors. The mold is then heated to about 390 Â°F (199 Â°C) on an open-face electric hot plate oven.
For the variant encountered in Daemonheim, see Cave crawler (Dungeoneering). Cave crawlers are Slayer monsters that require level 10 Slayer to kill. They drop a variety of Herblore related items and seeds. They are, however, poisonous, and have a fast healing rate (approximately 10 life points per second). Level 78 cave crawlers have a much higher chance of dropping herbs and seeds than the level 53 and 74.