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.
Exposure to lead is dangerous because this heavy metal is a toxin which can cause severe health problems and death at high levels of exposure. Humans have been working with lead for centuries, and giving themselves lead poisoning at the same time due to a lack of understanding about the risks of lead exposure.