The main difference between Platyhelminthes and Nematoda is that
Platyhelminthes consists of flatworms with a thin, dorso-ventrally flattened body whereas Nematoda consists of a cylindrical body, which is tapered to fine ends at each end
. Tapeworms, Turbellaria, Trematoda, and Monogenea examples of Platyhelminthes.
What are the key differences between the phylum to which flatworms and roundworms belong?
The roundworms belong to the
phylum Nemathelminthes or Aschelminthes
. They have a thin, dorsoventrally flattened body, so called flatworms. They have a long cylindrical body, vermiform, unsegmented with no lateral appendages. They do not have a body cavity and thus are acoelomates.
What are two major differences between Platyhelminthes and nematodes?
Species of nematodes are higher than that of Platyhelminthes.
Platyhelminthes have an incomplete gut whereas nematodes have a complete one
. Unlike in nematodes, Platyhelminthes have flame cells to do the excretory functions. The body length of flatworms may vary from 1 mm or less to many meters.
What are the similarities and differences among Platyhelminthes nematodes and annelids?
What are the similarities and differences among platyhelminthes nematodes and annelids?
Nematodes have an unsegmented body while annelids have a segmented body
. Nematodes have tapered body ends while annelids do not have tapered ends in their body. Nematodes can be over 4 feet long while annelids are 8-10 inches long.
What are differences between flatworms and roundworms?
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.
Is Nematoda and Aschelminthes same?
The Aschelminthes (also known as Aeschelminthes, Nemathelminthes, Nematodes), closely associated with the Platyhelminthes, are an obsolete phylum of pseudocoelomate and other similar animals that
are no longer considered closely related
and have been promoted to phyla in their own right.
What is difference between Platyhelminthes and Aschelminthes?
The main difference between Platyhelminthes and Aschelminthes is that
Platyhelminthes is a phylum containing acoelomates whereas Aschelminthes is a phylum containing pseudocoelomates
. Furthermore, Platyhelminths lack a non-living cuticle while Aschelminths have a non-living cuticle as a body covering.
What are flatworms characteristics?
Characteristics. Flatworms are
flattened and have bilateral symmetry
. They are triploblastic (have 3 embryonic tissue layers: ectoderm, mesoderm, and endoderm) and therefore have organ-level of organization. There is no body cavity, so they are acoelomate.
Is nereis a flatworm?
The organisms in the
Phylum Annelida
(Latin annellus, “ring”) are referred to as segmented worms to distinguish them from the non-segmented flatworms and roundworms. This phylum includes the common earthworm, leeches, and a large number of freshwater and marine species that are unfamiliar to most people.
Is Hirudinaria a flatworm?
Hirudinaria is known as
cattle leech
. It is free- living or living as parasites. They are invertebrates and are found in moist environments.
What is the difference between Platyhelminthes and Nematoda?
The main difference between Platyhelminthes and Nematoda is that
Platyhelminthes consists of flatworms with a thin, dorso-ventrally flattened body whereas Nematoda consists of a cylindrical body
, which is tapered to fine ends at each end. Tapeworms, Turbellaria, Trematoda, and Monogenea examples of Platyhelminthes.
Do nematodes have blood?
Roundworms: Also called nematodes, these worms are mainly found in soil. … As the name suggests, roundworms are tube-shaped. Their body cavity contains fluid that delivers oxygen to its organs. But
this fluid is not called blood
, because it does not circulate around the body.
What is the difference between Platyhelminthes Nematoda and Annelida?
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. … Worms are invertebrate animals with bilateral symmetry.
What diseases do flatworms cause?
Cestodes cause life-threatening diseases such as
neurocysticercosis and echinococcosis
, in which larval tapeworms form cysts inside human tissues (Figure 3B,E). Trematodes such as Clonorchis sinensis and Opisthorchis viverrini are among the few pathogens known to cause cancer.
What do flatworms look like?
Flatworms have
flat, symmetrical, leaf-shaped bodies
that grow to a size smaller than a quarter. The oyster flatworm is cream-colored with short tentacles on its sides and has eyespots in two rows along its head.
What do roundworms and flatworms have in common?
Flatworms’ bodies are flat and as soft as jelly. Some common ones are
planarians, flukes, and tapeworms
. … Unlike flatworms or cnidarians, roundworms have a tube-like digestive system that has two openings. Food enters through a mouth and wastes exit the other end of the digestive system.
