Cytoplasm surroundings mitochondria present in the middle piece of sperm is

Options

A. Manchette
B. Microplasm
C. Centroplasm
D. Acrosome.

Explanation

To answer the question regarding the cytoplasm surrounding the mitochondria present in the middle piece of sperm, follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Sperm**:
- The sperm consists of three main parts: the head, middle piece, and tail (flagellum). The middle piece is particularly important as it contains a high concentration of mitochondria.

2. **Identify the Function of Mitochondria in Sperm**:
- The mitochondria in the middle piece of the sperm provide the energy required for the sperm's motility. This energy is essential for the sperm to swim towards the ovum.

3. **Review the Options Given**:
- The options provided are:
- A) Manchette
- B) Microplasm
- C) Centroplasm
- D) Acrosome

4. **Analyze Each Option**:
- **Manchette**: This is a temporary structure that surrounds the sperm head, not the middle piece.
- **Centroplasm**: This refers to the cytoplasm surrounding the centriole and does not contain organelles.
- **Acrosome**: This is located at the head of the sperm and is involved in penetrating the ovum, not related to the middle piece.
- **Microplasm**: This is the term used to describe the small amount of cytoplasm that surrounds the mitochondria in the middle piece of the sperm.

5. **Select the Correct Answer**:
- Based on the analysis, the cytoplasm surrounding the mitochondria in the middle piece of sperm is known as **Microplasm**. Therefore, the correct answer is **B) Microplasm**.

### Final Answer:
The cytoplasm surrounding the mitochondria present in the middle piece of sperm is **Microplasm**.