Sunday, March 25, 2007

Reproduction System

Annelids have two types of reproductions:

asexual reproduction and sexual reproduction.

In asexual reproduction, some annelids use fission to produce quickly.. The backs of annelids will break and form a new alike worm. Usually, their break depends on their coats growing. Also, a few annelids reproduce by pudding. However, these annelids can reproduce themselves with using asexual methods because they have high organization, so they are able to reproduce by themselves.

Nevertheless, most annelids reproduce sexually because they are hermaphrodite, and they are unable to reproduce by themselves. Although these annelids like earthworm and leech can produce its own eggs and sperm, these eggs and sperm are hardly fertilized. So they need to pair a couple and connect each other to exchange their sperm. If the eggs are ready to be fertilized, the sperm will be discharged. After the eggs and sperm are fertilized together, the clitellum will produce a cocoon. Then the sexual reproduction is finished.
Fission: division of biological cells as a method of reproduction
Hermaphrodite: an animal that has both male and female sexual organs.
Clitellum: a part of worm's body wall that discharges a sticky substance during fertilization.


2 comments:

Unknown said...

Good information

Unknown said...

Incomplete knowledge.... some content more needed