One very special feature in the earthworm (Pheretima) is that:

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The typhlosole greatly increases the effective absorption area of the digested food in the intestine. In Pheretima, the intestine is next to the stomach. It is a long, wide and thin-walled tube extending from the 15th segment to the last. The second or middle part of the intestine lies between the 27th segment up to the 23-25th segments in front of the anus. This is characterised by the presence of a highly glandular and vascular longitudinal ridge, arising as a median ingrowth of the dorsal aspect of the intestinal cavity. This is called the typhlosole. The typhlosole greatly increases the effective absorption area of the digested food in the intestine.

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Fertilization of eggs occurs inside the body

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The S-shaped setae embedded in the integument are the defensive weapons used against the enemies

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It has a long dorsal tubular heart

One very special feature in the earthworm (Pheretima) is that:

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