![]() The absorbed mercury in humans becomes more toxic due to its prolonged half-life and lack of decomposition, and its interaction is not limited with various enzymes and proteins. Once these metals are absorbed into the human body, they can be a threat with more health issues. The metals such as cadmium, mercury, and lead are owing much more interest to environmental scientists due to their accumulation in vital organs of the living beings. ![]() Heavy metal contamination is a serious problem to the environment, because they are not only biodegradable but also toxic to living organisms. The present chapter describes the mercury sources, types of exposures, types of poisoning, treatments, and preventive measures of mercury poisoning. Mercury poisoning effects on the human body are not limited to reddishness of hands and feet renal failures cardiovascular, liver, brain, and hormonal issues and intestinal ulceration. Symptoms of mercury poisoning depend on the type, dose, method, and duration of exposure. Mercury poisoning occurs by exposure to mercury, i.e., acute and chronic exposures. Mercury is the only metal that exists in liquid state at normal temperature and pressure. Mercury in +2 state is more poisonous due to high solubility. But the liquid mercury can vaporize, and gaseous mercury becomes poisonous due to its nature of being absorbed into the blood. Liquid metal state mercury (Hg) has little to no solubility and is not poisonous. It is also called as quicksilver due to its fast movement and silvery tinge. Mercury was the name of the Roman messenger of god who can move really fast.
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