platyhelminthes examples
Platyhelminthes Examples
The animal kingdom is a wonderful one. It has so many different members, that are all equally interesting to study. Read this article on platyhelminthes examples to know more about this fascinating phylum.
- Nervous System: The nervous system is made up of nerve tissues and nerve chords. The nerve tissues are located at the front end of the organism and can be called the 'brain'. From this mass of nerve tissues, two nerve chords separate and run through the entire length of the body. From these nerve chords rise other nerve branches all across the body, much resembling distributaries separating from a river. These branches are connected to sensory organs which detect sight, touch, movement, etc.
- Reproductive System: Flatworms are capable of sexual reproduction. However, they are also good examples of asexual reproduction in animals. Asexual reproduction is seen in the more primitive forms of the organism, while sexual reproduction is more evident in the complex forms. Asexual reproduction is carried out through fission and for sexual reproduction (though most platyhelminthes are hermaphrodites, self-fertilization does not take place), the penis comes out of its genital pore and fertilizes the ovary of the female, thus forming the egg and its yolk. The distinct feature about the yolk of these organisms is that it is formed outside the egg, surrounding it. Fertilization takes place and the egg moves down from the ovary duct and finally out of the genital pore.
- Excretory System: Though platyhelminthes do not have an anus for excretion, they do have excretory pores. In the excretory system, there are flame cells (enlarged cells) which have tube like structures called protonephridia. These tubes collect excess water and other waste material from within the body and excrete it through pores called nephridiopores.
- Notoplana acticola
- Ectoplena
- Dugesia tigrina (water planaria)
- Oyster leech
- Bipalium pennsylvanicum (land planaria)
- Microstomum
- Catenula
- Fasciola hepatica
- Paragonimus
- Opisthorchis
- Schistosoma
- Cercaria
- Taenia Solium
- Taenia segineta
- Echinococus
- Taenia Saginata
- Hymenolepis nana
- Oculotrema hippopotami
- Amphibdella
- Entobdella soleae
- Isancistrum
- Polystoma intergerrimum
- Gyrodactylus elegans