Name the different types of excretory organs seen in earthworm.

Explanation

There are three types of nephridia,
1. Pharyngeal or tufted nephridia : Present as paired tufts in the 5th - 9th segments.
2. Micronephridia or Integumentary nephridia: Attached to the lining of the body wall from the 14th segement to the last which open on the body surface.
3. Meganephridia or septal nephridia: Present as pair on both sides of intersegemental septa of hte 19th segment to the last and open into intestine.
4. In earthworm besides nephridia, special extretory cells on the coelomic wall of the intestine, called chloragogen cell present.