02 Aug '12, 4am

The Tide Chaser: Flatworms (Phylum Platyhelminthes) of Singapore

The Tide Chaser: Flatworms (Phylum Platyhelminthes) of Singapore

Flatworms (Phylum Platyhelminthes) are unsegmented worms with soft and bilaterally symmetrical bodies. They are generally rather flat, and hence the common name "flatworm". The name "Platyhelminthes" originated from the Greek words "platy" (meaning "flat") while "helmins" (meaning "worm"). The flat body allows internal transportation of oxygen and nutrients by diffusion, since most of them do not have a body cavity, circulatory organ and respiratory organ (except for some larger species). They still possess a simple brain though at their front end, and lateral nerve chords. Hence, some scientists are studying their simple brains, so as to understand our more complex brains better. Flatworms have an incomplete digestive system, and the mouth is used for both ingestion and excretion. Most of them are hermaphrodites, meaning that each flatworm possesses both male and female r...

Full article: http://tidechaser.blogspot.com/2012/08/flatworms-platyhel...

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