Which of the following statements is correct?

Options

A. Vasa recta is well developed in cortical nephrons.
B. PCT and DCT are situated in the medulla of the kidney.
C. The glomerulus encloses the Bowman's capsule
D. The acending limb of the Henle's loop extends as the DCT.

Explanation

To determine which of the statements regarding the kidney is correct, let's analyze each statement step by step based on the information provided in the video transcript.

### Step-by-Step Solution:

1. **Understanding the Structure of the Kidney:**
- The human kidney is horseshoe-shaped and consists of two main regions: the outer cortex and the inner medulla.
- The nephron is the structural and functional unit of the kidney.

2. **Identifying Components of the Nephron:**
- Each nephron consists of the Bowman's capsule and the glomerulus.
- The Bowman's capsule encloses the glomerulus, which is a tuft of capillaries.

3. **Analyzing Each Statement:**
- **Statement 1:** "Vasa recta is well developed in cortical nephrons."
- **Analysis:** This is incorrect. Vasa recta is associated with juxtamedullary nephrons, which have a well-developed loop of Henle. Cortical nephrons have shorter loops and thus less developed vasa recta.

- **Statement 2:** "PCT, DCT situated in the medulla of the kidney."
- **Analysis:** This is also incorrect. The proximal convoluted tubule (PCT) and distal convoluted tubule (DCT) are located in the cortex, while the loop of Henle is in the medulla.

- **Statement 3:** "Glomerulus encloses Bowman's capsule."
- **Analysis:** This statement is false. It is actually the Bowman's capsule that encloses the glomerulus, not the other way around.

- **Statement 4:** "Ascending limb of loop of Henle extends to the DCT."
- **Analysis:** This statement is correct. The ascending limb of the loop of Henle does indeed lead into the distal convoluted tubule (DCT).

4. **Conclusion:**
- The correct statement among the options provided is: **"Ascending limb of loop of Henle extends to the DCT."**