What happens if the water level in the blood drops too low?

Explanation:

If your blood sodium levels get too low, you might develop a condition called hyponatremia.

Because of the low sodium, the amount of water in your body rises ... usually appear when your level of sodium suddenly rises or drops.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a