What is the significance of microglial cells?

Explanation

### Step-by-Step Text Solution

1. **Understanding Microglial Cells**: Microglial cells are a type of glial cell located in the central nervous system (CNS). They play a crucial role in maintaining the health of the brain and spinal cord.

2. **Origin of Microglial Cells**: These cells are derived from the mesodermal layer during embryonic development. This is significant because it highlights their unique origin compared to other types of glial cells that may originate from the ectoderm.

3. **Phagocytic Function**: Microglial cells are known for their phagocytic capabilities. This means they can engulf and digest cellular debris, dead neurons, and pathogens. This function is vital for the maintenance of a healthy neural environment.

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