what are the extensions of the cortex-like tissue between the renal pyramids
The correct answer and explanation is:
The extensions of the cortex-like tissue between the renal pyramids are called renal columns.
Explanation:
The renal columns are formed by cortical tissue that extends down between the renal pyramids in the kidney. The kidney is divided into two main regions: the outer renal cortex and the inner renal medulla. The renal pyramids, which are cone-shaped structures located in the medulla, contain the renal tubules and are responsible for the collection of urine. The renal columns act as extensions of the cortical tissue that separate adjacent renal pyramids.
The renal columns contain blood vessels, such as the interlobar arteries and veins, which supply the renal pyramids and the rest of the kidney with blood. They also provide structural support for the kidney. These columns ensure that the cortex remains continuous while dividing the medulla into sections, which are essential for the functional organization of the kidney.
The renal columns also play a role in the transport of urine. The collecting ducts in the renal pyramids drain into the renal pelvis, which is connected to the ureter. The urine produced in the renal pyramids travels through these ducts and eventually exits the kidney.
Overall, renal columns are crucial for maintaining the structural integrity of the kidney, organizing the renal pyramids, and supporting blood flow and urine drainage. Their presence ensures that the functional units of the kidney (nephrons) are properly supported and that waste processing and filtration can occur effectively.