Which of the following layers you will find in the body wall of earthworm (from outside to inside) ?

Options

A. a) Non-cellular cuticle, epidermis, circular muscles, longitudinal muscles, coelomic epithelium
B. b) Cuticle, epidermis, longitudinal muscles,circular muscles, coelomic epithelium
C. c) Non-cellular cuticle, epidermis, coelomic epithelium, circular muscles, longitudinal muscles
D. d) Cuticle,epdermis,peritoneal muscles

Explanation

To determine the layers found in the body wall of an earthworm from outside to inside, we can follow these steps:

1. **Identify the outermost layer**: The first layer of the earthworm's body wall is the **cuticle**. This layer is thin, transparent, and non-cellular.

2. **Identify the second layer**: Beneath the cuticle, we have the **epidermis**. This layer is cellular and is responsible for various functions, including secretion.

3. **Identify the muscle layers**: Following the epidermis, there are two muscle layers:
- The **circular muscle layer** is the outer muscle layer. It helps in the movement of the earthworm by contracting and relaxing.
- The **longitudinal muscle layer** is located beneath the circular muscle layer. It also plays a role in locomotion by allowing the earthworm to shorten and elongate.

4. **Identify the innermost layer**: The innermost layer is the **coelomic epithelium**, which lines the coelom (the body cavity) of the earthworm. This layer is important for the function of the coelomic fluid.

5. **Summarize the order of layers**: Therefore, the correct order of the layers from outside to inside is:
- Cuticle
- Epidermis
- Circular muscle layer
- Longitudinal muscle layer
- Coelomic epithelium

The correct sequence of layers in the body wall of the earthworm from outside to inside is: **Cuticle → Epidermis → Circular Muscle Layer → Longitudinal Muscle Layer → Coelomic Epithelium**.