What does the renal medulla contain?

What does the renal medulla contain?

• A. Renal cortex and renal capsule
• B. Renal pelvis and ureter
• C. Adrenal gland tissue
• D. Renal pyramids and renal columns

Answer: (D)

The renal medulla is organized into cone-shaped renal pyramids that are separated by lighter renal columns of cortical tissue. The pyramids contain portions of the collecting ducts and tubules (including the loops of Henle) that drain toward the papillae, while the columns are bundles of cortex extending inward to separate the pyramids. The renal pelvis and ureter are part of the urinary-collecting system near the hilum, not within the medulla, and adrenal gland tissue sits on top of the kidney outside its own tissue layers. So, the structures defining the medulla are the renal pyramids and renal columns.

The renal medulla is organized into cone-shaped renal pyramids that are separated by lighter renal columns of cortical tissue. The pyramids contain portions of the collecting ducts and tubules (including the loops of Henle) that drain toward the papillae, while the columns are bundles of cortex extending inward to separate the pyramids. The renal pelvis and ureter are part of the urinary-collecting system near the hilum, not within the medulla, and adrenal gland tissue sits on top of the kidney outside its own tissue layers. So, the structures defining the medulla are the renal pyramids and renal columns.