What is the fluid excreted by kidneys for emotions?​

The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine. This is done with the help of millions of nephrons present in the kidney. The filtrated blood is carried away from the kidneys by the renal vein (or kidney vein).

The fluid is called Urea

Explanation:

The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine.

cell regulation is conducted by special proteins.

answer; i believe the answer is (polygenic inheritance;