Question

In the transverse section of Pheretima, identify the correct sequence of body wall layers from outer to inner side.
(A) Circular muscles
(B) Parietal peritoneum
(C) Epidermis
(D) Cuticle
(E) Longitudinal muscles

• A. D$\to$ C $\to$ E $\to$ A $\to$B
• B. D$\to$ C $\to$ A $\to$ E $\to$ B
• C. D $\to$ B $\to$ A $\to$ E $\to$C
• D. C $\to$ B $\to$ E $\to$ A $\to$ D

Answer 1

Answer: (B)

D$\to$ C $\to$ A $\to$ E $\to$ B

In the transverse section of body wall of Pheretima, the wall layers from outer side (periphery) to innerside are cuticle, epidermis (supporting epidermal cells, which include albumen and mucous cell), circular muscular layer (circular muscle), longitudinal muscle layer (longitudinal muscle), then circular muscles strand and the last is parietal layer of coelomic epithelium (parietal peritoneum).

Thus, the correct answer is option B.