Final answer:
The outermost region of the kidney is the renal cortex, containing nephrons and serving as the primary filtration layer. It is distinct from the renal medulla, which is in the middle, and the renal pelvis, which is the innermost part leading to the ureter.
Step-by-step explanation:
The outermost region of the kidney is known as the renal cortex. The renal cortex is a granular layer that contains the nephrons, which are the functional units of the kidney responsible for filtering blood and generating urine. The renal medulla is located in the middle, housing the renal pyramids and serving to separate the internal sections of the kidney. The renal pelvis is the innermost part, collecting urine and leading to the ureter. The renal pelvis also branches into the major calyces and further into minor calyces.
Answering the student's question, the outermost region is known as the B) renal cortex.
The outermost region of the kidney is known as the renal cortex. It is the outer region of the kidney, and it contains the nephrons, which are the functional unit of the kidney.
The renal medulla is the middle region of the kidney, and it consists of multiple pyramidal tissue masses called the renal pyramids.
The renal pelvis is the expanded end of the ureter, and it collects the urine and leads to the ureter on the outside of the kidney.