What percentage of cardiac output does the kidney typically receive?

The kidneys receive approximately 20 to 25% of the total cardiac output. This significant percentage reflects the vital role kidneys play in filtering blood, regulating fluid balance, electrolytes, and maintaining overall homeostasis in the body. The high blood flow to the kidneys is necessary for the glomerular filtration process, where blood is filtered to form urine while reclaiming substances the body needs.

Receiving 20 to 25% of cardiac output allows the kidneys to efficiently perform their functions such as excretion of waste products, regulation of blood pressure, and management of electrolyte balance. This is in contrast to other organs which might have a lower percentage of blood flow relative to their size and function. Understanding this aspect of renal physiology is crucial for healthcare professionals, especially when considering conditions that can affect renal perfusion and function.