What is difference between flatworms and earthworms?
As nouns the difference between earthworm and flatworm is that earthworm is a worm that lives in the ground while flatworm is any of very many parasitic or free-living worms, of the phylum platyhelminthes , having a flattened body with no skeleton or body cavity.
What are 4 characteristics of flatworms?
They are bilaterally symmetrical, triploblastic, they lack an anus, and they have no body cavity other than the gut. Platyhelminthes are divided into three classes: Turbellaria, a free-living marine species; Monogenea, ectoparasites of fish; Trematoda, internal parasites of humans; and other species.
Do flatworms have external appendages?
They have a complete digestive system and a pseudocoelomic body cavity. They are characterized by a segmented body and jointed appendages. In the basic body plan, a pair of appendages is present per body segment.
Are earthworms roundworms or flatworms?
When an animal or human is said to “have worms”, it means that it is infested with parasitic worms, typically roundworms or tapeworms. Lungworm is also a common parasitic worm found in various animal species such as fish and cats….References.
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How are roundworms different from flatworms?
A flatworm has a thin, dorsoventrally flattened body. Roundworms are more cylindrical in shape and tapered to a fine point at one end. Flatworms generally live in bodies of water, while roundworm species can live either on water or in soil.
What organ systems do flatworms have?
Flatworms are hermaphroditic and capable of sexual and asexual reproduction. Their bodies have only a single opening, which serves as both a mouth and an anus. They are, as their name implies, flat. They have no circulatory system or body cavity (coelom), but they do have an excretory and digestive system.
What is the scientific name of flatworm?
Platyhelminthes
Flatworm/Scientific names
What are the 3 groups of flatworms?
The Phylum: Platyhelminthes includes the flatworms (Planaria, flukes & tapeworms) Three Classes treated here are Turbellaria, Trematoda and Cestoda.
What are the key features of flatworms?
The main characteristics of flatworms (Figure below) include:
- Flatworms have no true body cavity, but they do have bilateral symmetry.
- Flatworms have an incomplete digestive system.
- Flatworms do not have a respiratory system.
- There are no blood vessels in the flatworms.
How are flatworms and roundworms similar to segmented worms?
Flatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian. Roundworms (phylum Nematoda) have a slightly more complex body plan. Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans.
What organs do flatworms have?
Flatworms are generally hermaphroditic—functional reproductive organs of both sexes occurring in one individual. Like other advanced multicellular animals, they possess three embryonic layers—endoderm, mesoderm, and ectoderm—and have a head region that contains concentrated sense organs and nervous tissue (brain).