Video: The Sensory System: Definition, Parts & Functions. This lesson will examine how the sensory systems are integrated and how they function as a whole. Instead of telling you ears hear and eyes see, we will examine how these systems are actually very similar in terms of reception, signals, and translations.
Mercury is a silvery-white metal element that is liquid at ordinary room temperature; it has no taste or smell. It occurs as metallic mercury (Hg), as cinnabar (HgS) and in perhaps 25 other in organic mineral compounds. The elemental form (Hg) vaporizes at any temperature down to almost 40Â° below zero. The vapor also has no taste or smell. The specific gravity of mercury is 13.546; therefore, it is heavier than lead and, like lead and other heavy metals, it is a potent poison. Exposure to metallic mercury or mercury compounds, even in small quantities over a period of time, can cause severe poisoning.
Question: Can You Touch Mercury? Mercury is the only metal that is liquid at room temperature. Although it has been removed from most thermometers, you can still find it in thermostats and fluorescent lights. Do you know what happens if you touch mercury or whether it is safe? Here's a look at what to expect and the health hazards of touching liquid mercury. Also, find out what to do in the event of a spill. Answer: It's never safe to touch mercury. You'll hear older people tell you how it used to be common to use liquid mercury in labs and poke at it with fingers and pencils.