![]() ![]() They activate vitamin D, which helps to maintain strong bones, and produce erythropoietin, a hormone that is vital for the production of red blood cells.Įach kidney contains 1.0–1.5 million small tubes called nephrons. The kidneys filter blood through a network of small blood vessels called the glomerulus. This produces a solution that then flows through the nephrons. The kidneys ensure that the make-up and volume of the fluids in the body is correct. They help control the chemical balance of the blood and regulate the body's level of sodium, potassium and calcium. The kidneys remove waste products and excess water from the body and so help to regulate blood pressure. They produce erythropoietin, a hormone that is vital for the production of red blood cells.They activate vitamin D, which helps to maintain strong bones.The kidneys remove waste products and excess water from the body and so help to regulate blood pressure.They help control the chemical balance of the blood and regulate the body's level of sodium, potassium and calcium.The kidneys ensure that the make-up and volume of the fluids in the body is correct.The kidneys have a number of roles in the body ![]() Graphic showing a section through the right kidney with the main structures labelled. ![]()
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