Final answer:
The inner part of the kidney is called the renal medulla, which consists of renal pyramids pointing toward the renal pelvis.
Step-by-step explanation:
The structure that represents the inner part of the kidney is the renal medulla. The renal medulla is the middle region of the kidney, located between the renal cortex and the renal pelvis. It consists of multiple pyramidal tissue masses called the renal pyramids, which have renal papillae that point toward the renal pelvis.