Name the various layers of body wall in earthworm.

Explanation

### Step-by-Step Solution:

1. **Identify the External Layer**: The outermost layer of the earthworm's body wall is the **cuticle**. This is a thin, non-cellular layer that provides protection.

2. **Locate the Epidermis**: Beneath the cuticle, the next layer is the **epidermis**. This layer is made up of living cells and plays a role in secretion and absorption.

3. **Muscle Layers**: The earthworm has two distinct muscle layers beneath the epidermis:
- The **circular muscles**: These muscles encircle the body and help in the contraction and elongation of the worm.
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