What is the role of the kidneys in the human body?

The kidneys are a pair of organs in the abdomen that perform many important functions in the human body, including:
Filtering blood: The kidneys remove waste products and extra water from the blood, which is then excreted as urine.
Balancing chemicals: The kidneys help maintain a healthy balance of chemicals like sodium, potassium, calcium, and phosphorus in the blood.
Regulating blood pressure: The kidneys release hormones that help control blood pressure.
Stimulating red blood cell production: The kidneys produce hormones that stimulate the bone marrow to make red blood cells.
Maintaining pH balance: The kidneys help keep the body’s pH stable by reabsorbing and producing bicarbonate from urine.
Activating vitamin D: The kidneys help activate vitamin D from diet and sunlight to keep bones and muscles healthy.
Making glucose: The kidneys make sugar (glucose) if the blood doesn’t have enough sugar.
The kidneys are located below the ribs toward the middle of the back.