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Flatworms
The phylum Platyhelminthes (aka flatworms) are rather primitive invertebrates that can be either parasitic or non-parasitic depending upon the species. They have no body cavity, no circulatory organs and no respiratory organs. Questions about flatworms can be asked and answered here.
383 Questions
Are flatworms and roundworms single celled eukaryote?
No, flatworms and roundworms are not single-celled eukaryotes; they are multicellular organisms that belong to the animal kingdom. Flatworms are part of the phylum Platyhelminthes, while roundworms belong to the phylum Nematoda. Both are classified as invertebrates and exhibit complex body structures, with specialized tissues and organs.
What do red rim flatworms eat?
red-rim flatworms do eat but they use poison to keep predators away from their prey
What are the defining features of the flatworm?
1.they have a leaf shape body and the body of these animals is soft and compressed from center.
2. There are about 20000 species of flat worms living in marine, freshwater and damp terrestrial habitats.
3. They are triploblastic acoelomate. There is development of a third layer, the mesoderm, which separates the ectoderm and endoderm.
4. Flatworms exhibit bilateral symmetry, and body is unsegmented.
5. They range in size from few millimeters to several meters.
6. Much of the body space is taken up by a branching sac type digestive system. Thedigestive system is poorly developed in some species or may be absent.
7. The excretory system consists of branching tubes ending in bulb like cells, the flame cells.
8. A well-developed nervous system is present in flatworms.
9. Respiratory and circulatory systems are absent.
10. The parasitic species absorb nutrients from the hosts. The free-living species feed on small animals and bodies of dead and decaying animals.
11. The free-living forms are motile. They move by cilia present on their undersides.
12. They reproduce by both sexual and asexual methods.
