What cells form the insulating sheaths around axons? Where are these cells found?

Explanation

**Step-by-Step Solution:**

1. **Identify the Cells Responsible for Insulation:**
The cells that form the insulating sheaths around axons are known as Schwann cells.

2. **Understand the Structure Being Discussed:**
The insulating sheath formed by Schwann cells is called the myelin sheath. This sheath is crucial for the proper functioning of nerve cells as it helps in the rapid transmission of electrical signals along the axon.

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