Kidneys are the most important organs of our excretory system, as they carry out the filtration process to get rid of the waste material that is produced in our body due to various cellular activities.
In the case of kidney failure, waste materials are not filtered and are sent back to our body.
As these waste materials are toxic and harmful the blood becomes darker and toxic because of the build-up of different harmful waste substances.
This ultimately starts affecting different organs of our body.