salts and urea
There are many ways but the main one is coal and nuclear wastes.
Cellular wastes.
The main function of the circulatory system is to transport nutrients, oxygen, and wastes through the body. It also carries immune components and hormones.
We are running out of room to put the wastes of it. Right now we have one major place to put them and each plant has a cement building to house them. It costs too much to run them but the main reason is that the wastes stay radioactive for decades.
to get rid of wastes and take in nutrients
The two main wastes removed by the urinary system from the blood are urea and creatinine. Urea is a byproduct of protein metabolism, while creatinine is a waste product of muscle metabolism.
The main function of the circulatory system is the transportation of needed materials throughout the body. These include nutrients, oxygen, wastes, hormones, and immune materials.
The main function of the circulatory system is to carry oxygen, nutrients and wastes to and from the body tissues. Its main organs are the heart and blood vessels.
A capillary is a blood vessel that is one cell thick for the absorption of nutrients and removal of wastes.
The body eliminates solid wastes through bowel movements, liquid wastes through urination, and gases through breathing. Solid wastes are formed in the colon, liquid wastes are filtered by the kidneys and eliminated as urine, and gases are exchanged in the lungs during respiration.
The three main nitrogenous wastes in animals are ammonia, urea, and uric acid. Ammonia is the most toxic and soluble in water, requiring a high volume of water for its excretion. Urea is less toxic and requires a moderate amount of water for excretion. Uric acid is the least toxic and least soluble, needing very little water for excretion.
The wastes which are collected in the kidney is the toxic nitrogenous waste urea, excess water and excess salts are the main wastes.