Question

How is the dorsal surface of the body of earthworm identified?

Answer 1

Dorsal surface of the body of the earthworm:

1. Due to the existence of some specific features in the body of an earthworm, it can be divided into dorsal and ventral sides.
2. Because it is defined by a black median mid-dorsal line along the body's longitudinal axis, the dorsal surface is darker than the ventral surface.
3. The earthworm's dorsal surface is darker than its ventral surface.
4. Setae are also absent on the dorsal surface.