Which one of the following statements is incorrect?

Options

A. The medullary zone of kidney is divided into a few conical masses called medullary pyramids projecting into the calyces.
B. Inside the kidney, the cortical region extends in between the medullary pyramids as the renal pelvis, which forms the columns of Bertini.
C. Glomerulus along with Bowman's capsule is called the renal corpuscle.
D. Renal corpuscles, proximal convoluted tubule (PCT) and distal convoluted tubule (DCT) of the nephron are situated in the cortical region of kidney.

Answer

To solve the question regarding which statement is incorrect, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding the Structure of the Kidney:**
- The kidney is divided into two main zones: the outer cortex and the inner medulla.
- The medullary zone contains structures known as medullary pyramids, which are conical masses that project into the calyx.

2. **Analyzing Option A:**
- Option A states that the medullary zone of the kidneys is divided into conical masses called medullary pyramids projecting into the calyx.
- This statement is **correct** as it accurately describes the anatomy of the kidney.

3. **Analyzing Option B:**
- Option B claims that the cortical region extends between the medullary pyramids as a renal pelvis.
- This statement is **incorrect**. The cortical region actually extends between the medullary pyramids as renal columns, not as a renal pelvis. The renal pelvis is a structure that collects urine from the calyces and is not part of the cortex.

4. **Analyzing Option C:**
- Option C states that the glomerulus along with the Bowman's capsule is called the renal corpuscle.
- This statement is **correct**. The renal corpuscle indeed consists of the glomerulus and the Bowman's capsule.

5. **Analyzing Option D:**
- Option D mentions that the renal corpuscles, proximal convoluted tubule, and distal convoluted tubule of the nephron are situated in the cortical region of the kidney.
- This statement is also **correct**. Both the renal corpuscles and the convoluted tubules are located in the cortex.

6. **Conclusion:**
- After analyzing all options, the incorrect statement is **Option B**.

### Final Answer:
The incorrect statement is **Option B**: "The cortical region extends between the medullary pyramids as a renal pelvis."