Human Excretory System: Anatomy of Kidneys -
- Towards the centre of the inner concave surface of the kidney is a notch called hilum through which ureter, blood vessels and nerves enter.
- A section through the kidney reveals an outer region called the renal cortex and an inner region called the medulla.
- The medulla is divided into a few conical masses (medullary pyramids) projecting into the calyces.
- Emerging from the hilum is the renal pelvis, which is formed from the major and minor calyces in the kidney.
- The cortex extends in between the medullary pyramids as renal columns called Columns of Bertini.
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The medulla is divided into a few conical masses (medullary pyramids) projecting into the calyces. Hence, the correct option is calyces
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