How do Schwann cells and oligodendrocytes differ in shape and location?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Function of Schwann Cells and Oligodendrocytes:**
- Both Schwann cells and oligodendrocytes are types of glial cells that are responsible for the myelination of axons in the nervous system. Myelination is crucial for the efficient transmission of nerve impulses.

2. **Identifying the Location:**
- **Schwann Cells:** These cells are located in the peripheral nervous system (PNS). They myelinate the axons of peripheral nerves.
- **Oligodendrocytes:** These cells are found in the central nervous system (CNS). They myelinate axons in the brain and spinal cord.
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