Which cells secrete the neurilemma ?

Explanation

### Step-by-Step Solution:

1. **Understanding Neurillemma**: Neurillemma is the outermost layer of a nerve fiber that surrounds the axons of neurons. It is crucial for the protection and regeneration of nerve fibers.

2. **Function of Neurillemma**: The primary function of the neurillemma is to provide a protective covering for neurons, ensuring that signals are transmitted effectively without loss.

3. **Cell Type Responsible for Secretion**: The cells responsible for secreting the neurillemma are known as Schwann cells. These cells are a type of glial cell found in the peripheral nervous system.

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