Some interesting facts about human kidneys include the fact that the left one is slightly higher than the right one. Both kidneys are located toward the back of the body, beneath the ribs. The slightly different positioning is to allow for the size of the liver on the right.
The kidneys are famously bean shaped, and their inner indentation makes room for renal veins and arteries, as well as the ureters that connect to the urinary bladder. Each kidney is capped with an adrenal gland, which produces hormones such as cortisol and sex hormones.
The kidneys are responsible for balancing and regulating several systems in the body. These include filtering waste from the blood and excreting it through the urine. They also control the amount of water in the body. If the body has too much water, the volume of urine is increased. If there's too little water, the volume is decreased, and the urine is concentrated.
Another fact about the kidneys are that they balance the pH level of the blood by controlling how much hydrogen and bicarbonate ions are excreted from the body. They also control the balance of electrolytes such as sodium, potassium, chloride, calcium and magnesium. Kidneys are also crucial in the control of blood pressure. They do this by regulating the amount of sodium and water.