Functions of the urinary system include all of the following except regulation of blood volume and blood pressure. regulation of plasma concentration of certain ions. to stabilize blood ph. storage of fat-soluble vitamins. conservation of valuable nutrients.

Storage of fat-soluble vitamins.

Explanation:

The urinary system regulates blood volume and blood pressure by adjusting amount of water lost in urine, regulate plasma concentration of certain ions such as sodium and chloride, helps reabsorption of valuable nutrient from the nephric filtrate.

The urinary system does not paly role in the storage of fat-soluble vitamins. Vitamins are a group of substances which required for the normal functioning of the body. Vitamins are segregated into two groups- Water-soluble vitamins and Fat-soluble vitamins. Water-soluble vitamins such as vitamin B-complex and vitamin C are eliminated through urine in case of excess in the body but fat-soluble vitamins such as vitamins A, D, E, and K are absorbed more easily by the body and are stored in the fatty tissue.  

coal is not sustainable because it will one day run out.