Merck Manual

Please confirm that you are a health care professional

The kidneys consist of an outer part (cortex) and an inner part (medulla). The nephrons filter the blood and produce urine.
The kidneys consist of an outer part (cortex) and an inner part (medulla). The nephrons filter the blood and produce urine.
The kidneys consist of an outer part (cortex) and an inner part (medulla). The nephrons filter the blood and produce urine.