A nerve is a complex of several bundles of nerve fibres enclosed together by a common sheath of conncective tissue. A bundle of nerve fibres, fasciculus is surrounded by

Options

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

Answer

To solve the question regarding what surrounds a bundle of nerve fibers (fasciculus), we can follow these steps:

### Step 1: Understand the Structure of a Nerve
A nerve is made up of multiple bundles of nerve fibers known as fasciculi. Each fasciculus consists of individual nerve fibers, and these bundles are organized and protected by connective tissue.

### Step 2: Identify the Layers of Connective Tissue
Nerves have three layers of connective tissue:
- **Epineurium**: This is the outermost layer that surrounds the entire nerve.
- **Perineurium**: This layer surrounds each fasciculus (bundle of nerve fibers).
- **Endoneurium**: This is the innermost layer that surrounds individual nerve fibers.

### Step 3: Focus on the Fasciculus
Since the question specifically asks about what surrounds a bundle of nerve fibers (fasciculus), we need to identify which connective tissue layer is responsible for this.

### Step 4: Determine the Correct Answer
From our understanding:
- The **perineurium** surrounds each fasciculus, providing protection and maintaining homeostasis.
- The **endoneurium** surrounds individual nerve fibers.
- The **epineurium** surrounds the entire nerve.
- The **myelin sheath** is not a connective tissue layer but rather an insulating layer around individual nerve fibers.

Thus, the correct answer is **perineurium**.

### Final Answer
The bundle of nerve fibers (fasciculus) is surrounded by **perineurium**.

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