The renal tubular of the uriniferous tubule is mainly made up to .... epithelium.

Options

A. Squamous
B. Cuboidal
C. Columnar
D. Ciliated

Answer

To solve the question regarding the type of epithelium that makes up the renal tubule of the uriniferous tubule, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure**:
- The uriniferous tubule refers to the nephron, which is the functional unit of the kidney. It consists of two main parts: the renal corpuscle (which includes Bowman's capsule and the glomerulus) and the renal tubule.

2. **Identifying the Parts of the Renal Tubule**:
- The renal tubule is divided into several segments:
- Proximal Convoluted Tubule (PCT)
- Loop of Henle (which has descending and ascending limbs)
- Distal Convoluted Tubule (DCT)

3. **Analyzing the Epithelium Types**:
- Each part of the renal tubule has a specific type of epithelial tissue:
- The **Proximal Convoluted Tubule (PCT)** is lined with **simple cuboidal epithelium** that has microvilli (often referred to as brush border) to increase surface area for reabsorption.
- The **Loop of Henle** has a thin segment lined with **simple squamous epithelium** and a thick segment lined with **cuboidal epithelium**.
- The **Distal Convoluted Tubule (DCT)** is also lined with **simple cuboidal epithelium**.

4. **Conclusion**:
- Given that the question asks about the renal tubule as a whole, the most representative type of epithelium for the renal tubule, particularly in the PCT where most reabsorption occurs, is **simple cuboidal epithelium**. However, it is important to note that the term "ciliated epithelium" mentioned in the video is misleading in this context, as the renal tubule does not have ciliated epithelium.

5. **Final Answer**:
- The renal tubule of the uriniferous tubule is mainly made up of **simple cuboidal epithelium**.