Table of Contents
How are Platyhelminthes and nematodes similar?
Similarities Between Platyhelminthes and Nematoda Both Platyhelminthes and Nematoda are unsegmented worms. Both Platyhelminthes and Nematoda are multicellular, mobile, invertebrate animals. Both Platyhelminthes and Nematoda are heterotrophs. Both Platyhelminthes and Nematoda show bilateral symmetry.
What are the similarities between Nematoda and Annelida?
Nematodes have an unsegmented body whereas annelids are metamerically segmented. Nematodes are pseudocoelomate, whereas annelids have a true coelom. Nematodes are dioecious, i.e. sexes are separate. Annelids are mostly hermaphrodites and free-living.
What differentiates annelids from Platyhelminthes and nematodes?
Answer. The main difference between Nematoda and Annelida is that Nematoda has a cylindrical body with tapered ends whereas Annelida has a cylindrical body, which is segmented. Therefore, Nematoda is called roundworms while Annelida is called segmented worms.
What is 1 difference and 1 similarity between Platyhelminthes and annelids?
ANNELIDS AND PLATYHELMINTHES Annelids are the most complex animals with worm-like body plans. Whereas Platyhelminthes are simple animals that are slightly more complex than a cnidarian. They both are bilaterally symmetrical and triploblastic.
What is the difference between phylum Nematoda and phylum Platyhelminthes?
The phylum Platyhelminthes contains flatworms, whereas nematodes are roundworms. Platyhelminthes are acoelomate, whereas nematodes have pseudocoelom. Platyhelminthes are hermaphrodites or monoecious, whereas nematodes are dioecious, i.e. sexes are separate.
What are the three main phyla of worms?
Worms are classified into three major phyla, or groups. They are flatworms, roundworms, and segmented worms. Flatworms belong to the phylum Platyhelminthes (plat ee hel MIN theeze). Most flatworms are parasites that obtain their food from a host animal.
What is the difference between nematodes and Platyhelminthes?
What are the morphological similarities and differences between nematodes and annelids?
Nematodes’ bodies are not segmented while annelids have segmented bodies. annelids possess a true coelom whereas nematodes possess a pseudocoelom. In addition, nematodes have small bodies compared to annelids. They also have tapered ends, unlike annelids.
Which characteristic does phylum Platyhelminthes differ from phylum Annelida?
| Annelida | Platyhelminthes |
|---|---|
| Dorsoventrally flattened | Body divided into small rings |
| Appendages (for locomotion) are absent | Appendages are absent |
| Ganglia are absent | Nervous system contains ganglia |
| True body cavity is present | True body cavity is absent |
What distinguishes Annelida from Platyhelminthes?
1 Answer. Platyhelminthes are worms with flat bodies (flatworms), nematodes are worms with cylindrical but not segmented bodies (roundworms). Annelids are cylindrical worms with segmented bodies (they are metameric).
How are roundworms and flatworms similar?
Similarities Between Flatworms and Roundworms Both flatworms and roundworms are unsegmented worms. Both flatworms and roundworms are multicellular, mobile, invertebrate animals. Both flatworms and roundworms are heterotrophs. Both flatworms and roundworms show bilateral symmetry.
What are 5 characteristics shared by all worms?
They have five paired organs that act like hearts to pump their blood through large blood vessels. They have a brain and nerve cord. They have reproductive organs and waste-removal organs. Well-developed muscles let the worms crawl through the soil or on top of the ground.
How are flatworms and roundworms similar from one another?
The term Platyhelminthes was given by Gegenbaur. The roundworms belong to the phylum Nemathelminthes or Aschelminthes….What is the difference between flatworms and roundworms?
| Flatworms | Roundworms |
|---|---|
| They do not have a body cavity and thus are acoelomates. | They are pseudocoelomates i.e. they have a body cavity between their mesoderm and endoderm layers. |
Do Platyhelminthes have a circulatory system?
Flatworms lack a respiratory or circulatory system; these functions take place by absorption through the body wall. Nonparasitic forms have a simple, incomplete gut; even this is lacking in many parasitic species. Movement in some flatworms is controlled by longitudinal, circular, and oblique layers of muscle.
What is the difference between Platyhelminthes and Nematoda?
What characteristics are common to all Platyhelminthes?
Platyhelminthes have the following important characteristics:
- They are triploblastic, acoelomate, and bilaterally symmetrical.
- They may be free-living or parasites.
- The body has a soft covering with or without cilia.
- Their body is dorsoventrally flattened without any segments and appears like a leaf.
What similarities are found among segmented worms?
Segmented worms have several body organs and systems. They have five paired organs that act like hearts to pump their blood through large blood vessels. They have a brain and nerve cord. They have reproductive organs and waste-removal organs.
What characteristics do worms from the various worm phyla have in common?
They all have long, narrow bodies without legs. All worms also have tissues, organs, and organ systems. Worms have bilateral symmetry. Unlike sponges or cnidarians, worms have distinct head and tail ends.
What are the main differences among the three main phyla of worms?
What are the main differences among the three main phyla of worms? Flatworms belong to the phylum Platyhelminthes, roundworms belong to the phylum Nematoda; segmented worms belong to the phylum Annelida.
What distinguishes annelida from Platyhelminthes?
Platyhelminthes are hermaphrodites with internal fertilization. Turbellaria, Trematoda, and Cestoda are the three classes of Platyhelminthes. Nematoda refers to a phylum of invertebrates with cylindrical bodies. Around 15,000 species of nematodes have been identified in the world. They are also called roundworms.
What is the difference between the different phyla of Worms?
The different phyla of worms display a great range in size, complexity, and body structure. Flatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian.
How are annelid worms different from flatworms and nematodes?
Each of these systems is more complex in the annelid than in flatworms or nematodes. In addition to a more specialized complete digestive system, annelid worms have also evolved body features not found in flatworms or nematodes.
What are the three classes of Platyhelminthes?
Platyhelminthes: Turbellaria, Trematoda, and Cestoda are the three classes of Platyhelminthes. Nematoda: Adenophorea and Secernentea are the two classes of Nematoda.