The vascular connective tissue sheath around a fascicula is called

Options

A. Epineurium
B. Perineurium
C. Endoneurium
D. Myelin sheath

Answer

To answer the question "The vascular connective tissue sheath around a fascicula is called," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- A fasciculus (plural: fascicula) refers to a bundle of muscle fibers or nerve fibers. It is important to identify the context in which we are discussing fascicula, as it can relate to both muscle and nerve tissues.

2. **Analyzing the Options**:
- **Option 1: Apineurium**: This term is often confused with other connective tissue sheaths. However, it is important to note that it refers to the outermost layer surrounding a nerve, not specifically a fasciculus.
- **Option 2: Perineurium**: This is the connective tissue sheath that surrounds a fasciculus of nerve fibers. It provides protection and support to the nerve fibers within the fasciculus.
- **Option 3: Endoneurium**: This is the connective tissue that surrounds individual nerve fibers within a fasciculus, not the fasciculus itself.
- **Option 4: Myelin Sheath**: This is a fatty layer that surrounds the axons of nerve cells, facilitating faster transmission of electrical signals, but it does not refer to the connective tissue sheath around a fasciculus.

3. **Identifying the Correct Answer**:
- Based on the definitions and the context, the correct term for the vascular connective tissue sheath around a fasciculus is **Perineurium**.

### Final Answer:
The vascular connective tissue sheath around a fasciculus is called **Perineurium**.

---