The cells which are elongated and slender within the seminiferous tubules and provide nourishment to the developing spermatocytes are:

Options

A. Spermatozoa
B. Leydig cells
C. Sertoli cells
D. Epithelial cells

Explanation

To solve the question, we need to identify the type of cells within the seminiferous tubules that are elongated, slender, and provide nourishment to developing spermatocytes. Here is a step-by-step breakdown:

### Step 1: Understand the Structure of Seminiferous Tubules
The seminiferous tubules are located within the testes and are responsible for the production of sperm. They contain various types of cells that play different roles in spermatogenesis (the process of sperm formation).

**Hint:** Look for cells that support or nourish developing sperm cells.

### Step 2: Identify the Key Cell Types
Among the options provided:
- **Spermatozoa** are the mature sperm cells, not the nourishing cells.
- **Lydig cells** (likely a typo for Leydig cells) are involved in hormone production (testosterone) but do not provide nourishment to developing sperm.
- **Sertoli cells** are known for their supportive role in the seminiferous tubules.
- **Epithelial cells** are a general term and do not specifically refer to the cells that nourish sperm.

**Hint:** Focus on the cells that are specifically known for their role in supporting sperm development.

### Step 3: Analyze the Role of Sertoli Cells
Sertoli cells are tall and columnar in shape, extending from the basement membrane to the lumen of the seminiferous tubules. They provide structural support and nourishment to the developing spermatocytes and spermatids. They also help in the process of spermatogenesis by secreting various substances that are essential for the maturation of sperm.

**Hint:** Remember that the cells providing nourishment and support during sperm development are specialized cells.

### Step 4: Conclusion
Based on the analysis, the correct answer to the question is **Sertoli cells**. They are elongated and slender cells within the seminiferous tubules that provide nourishment to the developing spermatocytes.

### Final Answer
The cells which are elongated and slender within the seminiferous tubules and provide nourishment to the developing spermatocytes are **Sertoli cells**.

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