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What are the defining features of the flatworm? Answer. Wiki User May 10, 2012 12:04AM. 1.they have a leaf shape body and the body of these animals is soft and compressed from center. 2. There are ...


The oldest confidently identified parasitic flatworm fossils are cestode eggs found in a Permian shark coprolite, but helminth hooks still attached to Devonian acanthodians and placoderms might also represent parasitic flatworms with simple life cycles.


Flatworms are the simplest of the worm groups. There are about 20,000 species in this group. Flatworms are found many places and can be free living or parasitic. A parasite lives off another living thing called a host and can be harmful. One of the best known flatworms is the tapeworm.


Flatworm, any of the phylum Platyhelminthes, a group of soft-bodied, usually much flattened invertebrates. A number of flatworm species are free-living, but about 80 percent of all flatworms are parasitic—i.e., living on or in another organism and securing nourishment from it. They are bilaterally


The structures of a flatworm and a earthworm are different by the way the are shaped. The earthworm is the one that looks like a regular worm it is more rounded and a flatworm looks like leeches.


Flatworms belong to the Phylum Platyhelminthes (Latin for "Flatworms," although it sounds much more official), whose characteristics shape - flat - is an evolutionary answer to a problem of multicellular life: as an animal gets bigger, the inside cells get farther and farther away from the outside, so that oxygen gets depleted before it reaches them and wastes build up on the way out.


Which of these features is seen in flatworms but not cnidarians? A mesoderm layer that gives rise to organs. Which of the following statements is NOT true about the flatworms? Liver flukes and blood flukes are parasites in humans only. Most Roundworms belong to the class. nematoda.


Flatworms Definition, Examples, Classification and Characteristics Definition - What are Flatworms? Flatworms (Platyhelminthes) are a group of bilaterally symmetrical, acoelomate, soft-bodied invertebrate animals found in marine, freshwater as well as moist terrestrial environments.


Flatworm - Flatworm - Internal features: Beneath the epidermis of turbellarians is a homogeneous or lamellated basal membrane. Club-shaped mesenchymal gland cells, opening externally, generally are present in all flatworms. In turbellarians two major types of mesenchymal glands occur: one produces a slimy material upon which the organisms creep; the other secretes an adhesive substance for ...


Flatworms live in water or environments with high moisture. Some species are microscopic, while others may be as long as 164 feet. All get their names from their characteristically flat bodies. The three main types of flatworms are free-living, flukes and tapeworms. Both flukes and tapeworms are parasitic, relying on ...