Question

Which of the following is a special feature of the earthworm?

• A. It has a long dorsal tubular heart.
• B. Fertilisation of eggs occurs inside the body.
• C. The typhlosole greatly increases the effective absorption area of the digested food in the intestine.
• D. The S-shaped setae embedded in the integument, are the defensive weapons used against the enemies.

Answer 1

Answer: (C)

The typhlosole greatly increases the effective absorption area of the digested food in the intestine.

Earthworm belongs to the phylum annelida. Typhlosole is a flap in intestine whose function is to increase absorptive surface area. It is found in the segment 26 to 95. It increases the capacity of excretion and absorption during digestion. It has a tubular digestive system which includes the pharynx, the oesophagus, the crop, the intestine and the gizzard.

So, the correct answer is option C.