Question
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
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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
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fertilisation of eggs occurs inside the body
Solution
A.
the typhlosole greatly increases the effective absorption area of the digested food in the intestine
A pair of short and conical intestinal caecae project from the intestine on the 26th segment. The characteristic feature of the interesting between 26-35 segments is the presence of an internal median fold of dorsal wall called typhlosole. This increases the effective area of absorption in the intestine.
