Projection of renal pelvis called

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Kidney:**
- The kidney is divided into two main regions: the outer region known as the renal cortex and the inner region called the renal medulla.

2. **Identifying the Renal Pelvis:**
- The renal pelvis is a flattened structure located at the center of the kidney, which serves as a funnel for urine flowing from the kidney to the ureter.

3. **Defining the Calyces:**
- The projections of the renal pelvis are known as the renal calyces. These are small, cup-like structures that collect urine from the renal pyramids.

4. **Understanding the Types of Calyces:**
- There are two types of calyces: minor calyces and major calyces.
- Minor calyces are smaller and directly receive urine from the renal pyramids.
- Major calyces are formed by the convergence of two or more minor calyces.

5. **Function of the Calyces:**
- The primary function of the renal calyces is to provide a passage for urine to flow from the renal pyramids into the renal pelvis, and subsequently into the ureter.

6. **Conclusion:**
- Thus, the projection of the renal pelvis is called the renal calyces.

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