Question

In earthworm, typhlosole is a component of
A) Male reproductive system
B) Female reproductive system
C) Stomach
D) Intestine

Answer 1

Hint:The annelids include all the worms and also the earthworm. They have segmented bodies that help them to conduct many functions; they have a digestive tract for the digestion of the food.

Complete answer:
To answer this question, we have to first know about the characteristics of earthworms. The earthworm has streamlined and segmented body that consist of many bristles termed as setae. The streamlined shape helps the earthworm to move in the soil and the bristles provide grip when the soil is wet. The circular muscles are segmented, these muscles work alongside the next group of muscles that found in its entire body help in its movement. To feed the earthworm pushes the pharynx out of the mouth to grab it and take the food inside the mouth then wet it with the saliva before digestion. The earthworms are hermaphrodite as they have both male and female reproductive systems after mating the male and female gametes get fused to form embryos. To survive in any environment whether it is hot or dry soil they undergo diapauses or hibernation that means it gets inactive and moves deep inside the soil and rolls itself as a tight ball and protected by releasing mucus. This mucus layer protects the water loss and maintains the metabolic reactions.
Now, Typhlosole in earthworms is a dorsal flap of the intestine that runs along most of its length, effectively forming a tube within a tube and increasing the absorption area by that of its inner surface.

Hence, the correct option is ‘D’. Intestine.

Note:The earthworms have a well developed digestive system including the excretory system. The earthworms also release mucus for protection from external pathogens. They are very useful for the environment.