Arrange the connective tissue sheaths of nerve from inside to outside
A) endoneurium `" "` B) perineurium
C) fascile `" "` D) epineurium  

Options

A. ABCD
B. ACBD
C. ADBC
D. BCAD

Answer

To arrange the connective tissue sheaths of a nerve from inside to outside, we need to understand the structure of a nerve and its components. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Identify the Basic Unit of Nerve**:
- The basic unit of a nerve is the neuron, which consists of dendrites, a cell body, and an axon.

2. **Understand the Structure of Nerve**:
- Nerves are made up of bundles of axons. Each axon is surrounded by a connective tissue sheath.

3. **Identify the Connective Tissue Sheaths**:
- The innermost sheath that surrounds each individual axon is called the **endoneurium** (A).
- Several axons are grouped together to form a bundle known as a **fascicle**.
- Each fascicle is wrapped in a layer of connective tissue called the **perineurium** (B).
- Finally, the entire nerve is covered by a protective outer layer called the **epineurium** (D).

4. **Arrange the Connective Tissue Sheaths from Inside to Outside**:
- Starting from the innermost layer:
- **Endoneurium (A)** - surrounds individual axons.
- **Fascicle (C)** - a bundle of axons.
- **Perineurium (B)** - surrounds each fascicle.
- **Epineurium (D)** - the outermost layer covering the entire nerve.

5. **Final Arrangement**:
- Therefore, the correct order from inside to outside is: **Endoneurium (A), Fascicle (C), Perineurium (B), Epineurium (D)**.

### Final Answer:
The correct order is A, C, B, D.

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