What is the function of the typhlosole in an earthworm?

In which segments of the earthworm are the spermathecae located?

The small longitudinal slit-like aperture present in the $Pygidium$ is known as:

In earthworms, in which segments are the accessory glands found?

Which of the following structures helps in the locomotion of an earthworm?

Which of the following animal's sensory system does not have eyes but does possess light and touch sensitive organs (receptor cells) to distinguish the light intensities and to feel the vibrations in the ground?