Answers. Relevance. Rating Newest Oldest. Best Answer: a Spanish term that was formerly used in the Spanish Empire to designate people of mixed European (Spaniard) and Amerindian ancestry living in the region of Latin America.[1] The word originated from the Romance language / Latin word Mixticius, meaning mixed.
For centuries, lead toxicity has been one of the most significant preventable causes of neurologic morbidity from an environmental toxin. A heavy metal, lead is ubiquitous in our environment but has no physiologic role in biological systems.
Where Lead Can Be Found. Download article as a PDF. Lead is a toxic metal that has been widely used in gasoline, construction, mining, manufacturing, and consumer products. Lead runoff from industrial sites has contaminated water supplies, and its use in gasoline created considerable air pollution.