What is the main difference between a nematode and a 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 differences between annelids and nematodes?

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 are two major differences between Platyhelminthes and nematodes?

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.

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.

How are Nemerteans different from the worms of phylum Platyhelminthes?

Nematodes are pseudocoelomates, while Platyhelminthes are acoelomates. 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.

What are the main differences between the Cnidaria and the Platyhelminthes phyla?

Flatworms are more complex than cnidarians. Cnidarians have two layers of cells, the ectoderm and the endoderm; flatworms have a middle layer called the mesoderm between the other two layers (Fig.

What is the difference between Annelida and Arthropoda?

Annelida and Arthropoda are two phyla of the kingdom Animalia. Both Annelida and Arthropoda are composed of segmented animals. The main difference between Annelid and Arthropoda is that Annelida consists of a hydrostatic skeleton whereas Arthropoda consists of an exoskeleton made up of chitin.

How can you tell the difference between an annelid and a nematode quizlet?

Nematodes have a muscular pharynx, with no muscles in the intestine ( gut ), and they have a longitudinal muscles in the body wall. b. Annelids have a circular and longitudinal muscles in the body wall and a digestive system.

How do nematode and annelid body plans differ?

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 makes flatworms and roundworms more complex than Poriferans and cnidarians?

3.36 B). Flatworms are more complex than cnidarians. Cnidarians have two layers of cells, the ectoderm and the endoderm; flatworms have a middle layer called the mesoderm between the other two layers (Fig.

How are annelid worms different from flatworms and roundworms?

In addition to a more specialized complete digestive system, annelid worms have also evolved body features not found in flatworms or nematodes. These features appear in some form in all larger, more complex animals: a coelom, a body cavity between the digestive tube and the external body wall that is lined with tissue.

Which morphological features differentiate the members of the phylum Annelida from nematodes and Platyhelminthes?

Annelid Morphology Platyhelminthes are worms with flat bodies (flatworms), whereas nematodes are worms with cylindrical but not segmented bodies (roundworms). Annelids are cylindrical worms with segmented bodies (they are metameric).

What is the difference between Platyhelminthes and Nematoda?

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.

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.

What are the characteristics of nematodes?

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. Since roundworms have a full-fledged body cavity, they are classified as pseudocoelomates. Nematodes lack a well-defined head. They have a simple digestive system.