30 Too much water can result in hyponatremia, a dilution of the blood’s salt content, which disrupts brain, heart, and muscle function. (A) Brain, heart, and muscle will malfunction if one stays too long in the water. (B) Both mental and physical functions can be affected if the blood’s salt content is too thin. (C) Hyponatremia is the major symptom for having too much salty water in one’s blood. (D) Suffering from hyponatremia means having too much water in one’s brain, heart, and muscle.