Generally, humans have four excretion systems consisting of kidneys, liver, lungs, and skin. Each of these organs functions to remove metabolic waste and toxins from the body. However, what if the excretion system is disturbed, what is the cause? The following is a full review. Kidney is one of the excretion system that functions to remove waste from the body in the form of urine. Basically, this process is needed by the body to keep the chemicals in the body stable. However, this process can be interrupted, especially when the kidney has certain medical conditions. Disorders and Diseases of the Kidney Excretion System Excretion tools in humans, like the kidneys, can be affected by a variety of factors. Here are some diseases and disorders that can affect kidney function: Kidney failure Kidney failure is a condition in which the kidneys do not function normally, cannot filter metabolic waste, are unable to control the amount of water and electrolytes in the blood, and canno...