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Tapeworms. Flukes and Planaria are also other examples of flat worms.
although most flatworms are aquatic, probably the best known flatworms are parasitic. Tapeworms (cestodes) and flukes (digeneans) are a couple of well-known flatworms.
The organs of excretion in flatworms are contractile vacuoles. Flatworms are invertebrates that do not have any specialized excretion organs.
The planaria class is Turbellaria
planeriacomes under kingdom animalea
Planaria are type of animals. Animals are not photosynthetic
sp refers to a planaria where the actual species is undetermined...or sometimes because several species of planaria have similar appearance or behavior and have been used in a study.
Planaria exist only in fresh waters.
Usually a planaria regeneration experiment involves cutting the planaria into different parts. The head can be separated from the tail or the planaria can be cut lengthwise, etc. After cutting the planaria, it will be observed for few days noting how the organism regenerate its lost body parts. Read more on planaria regeneration on t he link provided below.
Planaria prefer dark environments
No; they lack a mouth and anus. Tapeworms depend on the diffusion of already digested nutrients through their body surfaces. The scolex that might appear to be a mouth is actually not an opening at all: it contains hooks to allow the worm to attach itself to the host's intestines. An organism which is considered to possess a complete gut will have a mouth, stomach, and anus.
The scientific name for planaria is flatworms in the class Turbellaria, with species such as Dugesia tigrina commonly used in research and education.