Thin cytoplasmic layer is present in middle part of sperm is called :-

Options

A. Nebenkern
B. Manchette
C. Axial filament
D. Zensen ring

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Sperm:**
- The sperm is the male gamete produced through the process of spermatogenesis. It consists of several parts: the head, neck, middle piece, and tail.

2. **Identifying the Components of Sperm:**
- The head contains the acrosome filled with enzymes necessary for fertilization.
- The neck contains centrioles.
- The middle piece is crucial as it contains mitochondria.

3. **Function of Mitochondria:**
- The mitochondria in the middle piece are responsible for producing energy, which is essential for the movement of the sperm.

4. **Arrangement of Mitochondria:**
- The mitochondria are arranged in a spiral manner within the middle piece of the sperm.

5. **Cytoplasmic Layer:**
- The thin cytoplasmic layer that surrounds the mitochondria in the middle piece is known as the **Nebenkan sheath**.

6. **Conclusion:**
- Therefore, the thin cytoplasmic layer present in the middle part of the sperm is called the **Nebenkan sheath**.

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