Kidneys are an essential body organ. They have several extremely important purposes. Their main function is to filter toxic waste products out of your blood and also balance the levels of salts and water in your body. In addition to production of hormones responsible for production of red blood cells and maintain hemoglobulin level in the human body .

The location of the kidneys in your body
Most people have two kidneys, although it is possible to live a normal life with just one. Kidneys are bean shaped and about the size of a human fist. They are located at the back of your body just below the ribs.

How the kidneys work
Depending on your size, you have between 4 to 6 liters of blood in your body. The blood is transported through the kidneys by renal arteries. Typically, 1,500 liters of blood is filtered by the kidneys every day. ( wrong Typically around 7.5 L of blood cleaned by your kidney each hour and around 180 l per day and produce around 1.5 l of urine per day )The blood if clean by around one million tiny filters called nephrons. These are so small that you can only see them through a microscope. When nephrons lose their ability to filter the blood sufficiently, toxic waste products begin to build up in the blood.

Why your blood needs to be cleaned
When your body has taken the nutrition it needs from the food you eat, some of the waste products are sent back to your blood. The main function of your kidneys is to continuously filter these waste products out of your blood. If the kidneys fail to remove the toxic waste products from your blood, they build up and could severely damage other vital organs in the body.

Other functions of the kidney
Your kidneys have other functions too. They are essential for the balancing of volumes of fluid and minerals within the body.

Removing toxic wastes and excess fluids from the body
The substances that are filtered in the kidney are mixed with water and transformed into urine. The urine leaves the kidneys in small tubes and is collected in the bladder. The urine containing the waste products and water leaves your body through the urethra.

Continuous function produces some hormones and vitamins
The kidneys also produce active vitamin D which is needed for absorbing calcium from food. Calcium is crucial for building your bones. In addition, your kidneys help regulate your blood and stimulate the production of red blood cells. This function is performed by the kidney non-stop 24 hours every day.