The kidneys are vital organs in the human body that play a key role in filtering blood and producing urine. Within the kidney, there are specific structures known as the medulla and the pyramids, which serve distinct functions.
The medulla refers to the inner region of the kidney, which is essential for its filtration and urine production processes. It is characterized by its darker coloration and is where the renal pyramids are located. The medulla contains the nephron loops and collecting ducts that help concentrate urine before it exits the body.
On the other hand, the pyramids are the triangular structures found within the medulla. Each kidney typically has 8 to 12 renal pyramids, and they play a crucial role in channeling urine towards the renal pelvis. The base of the pyramid faces the outer region of the kidney, while the apex, or papilla, points towards the renal pelvis.
In summary, the key difference lies in their definitions: the medulla is the inner part of the kidney that contains the renal pyramids, which are the individual structures that participate in urine formation. Understanding these distinctions is crucial for comprehending the overall anatomy and functionality of the kidneys.