Kidneys are shaped like beans and are about the size of our fist. They are very important and are paired organs. Their primary function is to produce urine, which is why they are part of the urinary system. However, they have several secondary functions concerned with homeostatic functions.
In producing urine, the kidneys excrete the wastes such as urea and ammonium; the kidneys also are responsible for the re-absorption of glucose and the amino acids. These include the regulation of some electrolytes, acid-base balance, and most importantly the blood pressure. Finally, the kidneys are important in the production of hormones such as vitamin D, renin and erythropoietin.
It is now a common fact these days that a human being can also survive with one kidney. That is the reason why many people are encouraged to donate one of their kidneys if possible, in case of emergency. The reason for that is because people can die if they do not have a kidney. Having at least one kidney helps them to pull through life.
The kidneys are located on either sides of the body below the rib cage. They are connected to other parts of the body in such a way that they can collect urine; and so they are important organs.
Their relation with the urinary system is very necessary for the proper functioning of the body. The kidneys help in many ways to remove toxins from the body, and to resolve problems such as urinary infections. Thus, they are one of the most important organs of the body.
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