For the conduction of a healthy life and a healthy body, the proper functioning of the kidney is very crucial. The vital function of the kidneys for which it is also called the filtration bag of the body is that it is responsible for the filtration of waste along with the toxins and extra water in the body. The pathway of these wastes is the ureter, bladder and then the urethra from where it is expelled out of the body through the process of urination. Alongside, kidneys have many other significant functions under them such as regulation of salt, pot**ium, and pH levels inside a human body. In addition, functions like regulation of RBC producing hormones, control over RBC generation, activation of vitamin D in the body for the absorption of calcium is also what kidneys take care of.