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.
Symptoms of mercury poisoning. Although mercury is poisonous (toxic), it usually only causes problems if you inhale large amounts of it. Very little mercury is absorbed by your body if you swallow a small amount of liquid mercury or get it on your skin for a short time.This is considered almost non-toxic and you'll probably have no symptoms.However, if you breathe in mercury vapour or globules, it can be absorbed into the bloodstream and cause symptoms such as: 1  a cough. 2  breathlessness. 3  chest pains, a tight chest or a burning feeling in your chest. 4  feeling irritable and nervous.lthough mercury is poisonous (toxic), it usually only causes problems if you inhale large amounts of it. Very little mercury is absorbed by your body if you swallow a small amount of liquid mercury or get it on your skin for a short time. This is considered almost non-toxic and you'll probably have no symptoms.