The kidney is one of the most important organs in the human body, resembling the beans, but it is larger. It is about 12 centimeters tall and about seven centimeters wide and has a thickness of 3 cm. The most important function of the kidney is to purify blood and remove toxins from the body through metabolism, Which is responsible for the volume of fluids, in addition to its responsibility towards the arrangement of ions and salts, besides working in the regulation of blood pressure and work on the formation of types of hormones, and the kidney of the human body in the abdominal cavity below the diaphragm to the back, and the kidneys vary in height for the left kidney So that they are higher than the right kidney.
The blood reaches each kidney through an artery called the renal artery, which is divided into branches after entering the kidney for more than one branch of which the branches are smaller than the branch, to the bristles, to return the capillaries again to assemble and form branches and then exit through the renal vein.