Henle's loop occur in

Options

A. Seminiferous tubles of Frog
B. Seminiferous tubules of Rabbit
C. Nephrons of mammals
D. Nephrons of Frog

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where Henle's loop occurs. We need to identify the correct anatomical structure from the given options.

2. **Identifying the Options**: The options provided are:
- Seminiferous tubules of frog
- Seminiferous tubules of rabbit
- Nephrons of mammals
- Nephrons of frog

3. **Understanding Henle's Loop**: Henle's loop, also known as the loop of Henle, is a U-shaped structure found in the nephron, which is the functional unit of the kidney. It plays a crucial role in the reabsorption of water and sodium chloride.

4. **Analyzing the Nephrons**: Nephrons are divided into two main parts:
- Renal corpuscle (consists of Bowman's capsule and glomerulus, where filtration occurs)
- Renal tubules (where reabsorption occurs, including the proximal convoluted tubule, Henle's loop, and distal convoluted tubule)

5. **Determining the Presence of Henle's Loop**:
- **Seminiferous tubules of frog**: These are part of the male reproductive system and do not contain Henle's loop.
- **Seminiferous tubules of rabbit**: Similar to frogs, these are also part of the reproductive system and do not contain Henle's loop.
- **Nephrons of mammals**: Mammals have well-developed nephrons that include Henle's loop, which is essential for water and salt reabsorption.
- **Nephrons of frog**: Frogs have shorter nephrons that lack Henle's loop.

6. **Conclusion**: Based on the analysis, the correct answer is that Henle's loop occurs in the **nephrons of mammals**.

**Final Answer**: Nephrons of mammals (Option 3).

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