Middle piece of mammalian sperm contains

Options

A. Nucleus
B. Vacuole
C. Mitochondria
D. Centriole.

Answer

To answer the question, "What does the middle piece of mammalian sperm contain?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of Sperm**:
- Sperm is composed of three main parts: the head, the middle piece, and the tail. Each part has specific functions and structures.

2. **Identifying the Components of the Middle Piece**:
- The middle piece is located between the head and the tail of the sperm. It plays a crucial role in the sperm's function.

3. **Function of the Middle Piece**:
- The middle piece is primarily responsible for providing energy for the movement of the tail. This movement is essential for the sperm to swim towards the ovum for fertilization.

4. **Key Organelles in the Middle Piece**:
- The middle piece contains numerous mitochondria. Mitochondria are organelles that produce energy in the form of ATP through cellular respiration.

5. **Conclusion**:
- Therefore, the middle piece of mammalian sperm contains mitochondria, which are essential for generating the energy needed for sperm motility.

### Final Answer:
The middle piece of mammalian sperm contains **mitochondria**.

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