Renal Internal Anatomy | Kidney

Author: Scott A. Sheffield MS

Last update:

  • If the front half of the kidney is image descriptionremoved, it becomes possible to see that the inside is divided into three major regions or zones.
Anterior view on the right and left kidney.
Anterior view of a cross section of the left and right kidney.
1
2
  • The most external region is referred to as the image descriptionrenal cortex. Numerous tubes and blood vessels located in the cortex make it appear light red and somewhat granular.
Anterior view of a cross section of the left and right kidney.
1
2
Anterior view of a cross section of the left and right kidney.
1
2
  • This dark red area (Medulla)  is filled with 8-12 prominent renal pyramids. As the  name implies,  each pyramid is a cone-shaped structure. The expanded image description base of a pyramid  lies adjacent to the cortex and the tapered apex or image descriptionpapilla  is oriented toward the medial side of the kidney.
1
2
3
  • Numerous tubules and ducts make up the pyramids, which gives the pyramids a striated appearance, especially when viewed microscopically.
  • Next to the medulla is the image descriptionrenal sinus.  This medial pocket contains the large blood vessels that pass in and out of the kidney and the tubes that conduct urine to the ureters and bladder.

Did you know that you can learn anatomy while playing games? 

1
2

Test Yourself:

image descriptionShow/image descriptionHide answers

 

Test yourself image for the anterior view of the kidneys with the left kidney showing a cross-section with the renal pyramids magnified, answers hidden.
Test yourself image for the anterior view of the kidneys with the left kidney showing a cross-section and the renal pyramid magnified, answers shown.
1
2