The outer cortex of the kidney in a TS appears granular or dotted because of

Options

A. Granular cytoplasm
B. The presence of loop of Henle
C. The presence of collecting ducts
D. Much convoluted uriniferous tubules and Malpighian corpuscles in this region

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of the Kidney**:
- The kidney is composed of different regions, primarily the cortex and the medulla. The cortex is the outer layer, while the medulla is the inner layer.

2. **Identifying the Components of the Cortex**:
- The outer cortex contains structures known as Malpighian corpuscles (or renal corpuscles) and convoluted tubules. These components are crucial for the kidney's function in filtering blood and forming urine.

3. **Recognizing the Appearance of the Cortex**:
- In a transverse section (TS) of the kidney, the cortex appears granular or dotted. This is due to the presence of the Malpighian corpuscles and the convoluted tubules.

4. **Explaining the Granular Appearance**:
- The Malpighian corpuscles are spherical structures that appear as dots in the cortex. Additionally, the convoluted tubules, which are tightly coiled, contribute to the granular appearance because they occupy a significant amount of space in the cortex.

5. **Conclusion**:
- Therefore, the outer cortex of the kidney in a transverse section appears granular or dotted primarily because of the presence of much convoluted uriniferous tubules and Malpighian corpuscles in this region.

### Final Answer:
The outer cortex of the kidney in a transverse section appears granular or dotted due to the presence of much convoluted uriniferous tubules and Malpighian corpuscles in this region.

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