The health effects of mercury poisoning primarily affect which system?

Mercury poisoning has a significant impact on the neurological system because mercury is a heavy metal that can adversely affect the brain and nervous system. Exposure to mercury can lead to a range of neurological issues, including cognitive deficits, memory problems, and motor function impairments. It can also cause severe developmental issues in young children and fetuses, leading to lifelong consequences.

Unlike the other systems mentioned, the neurological system is particularly sensitive to mercury's toxic effects due to the element's ability to cross the blood-brain barrier and its accumulation in brain tissue. This distinguishes the neurological impacts of mercury from potential effects in other systems, such as respiratory, circulatory, or digestive, which are not the primary targets of mercury’s toxicity. Hence, understanding the distinct role mercury plays in harming the neurological system underscores why it is recognized as the primary area affected by mercury poisoning.