Animalscaretips
- What are Platyhelminthes classified as?
- What is the difference between annelida and Platyhelminthes?
- How does porifera Cnidaria and Platyhelminthes differ?
- Do Platyhelminthes have jointed appendages?
- Why are Platyhelminthes flat?
- Are annelids Dorsoventrally flattened?
- Are flatworms Cephalized?
- Are nematodes acoelomates?
- What do Platyhelminthes have that Poriferians and/or cnidarians don t?
- Are Platyhelminthes Protostome or Deuterostome?
- Does phylum Platyhelminthes have true tissue?
- Do arthropods have Protostome development?
- What makes platyhelminthes unique?
What are Platyhelminthes classified as?
flatworm, also called platyhelminth, 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.
What is the difference between annelida and Platyhelminthes?
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.
How does porifera Cnidaria and Platyhelminthes differ?
Porifera (sponges) have specialized cells and an endoskeleton but lack true tissues and body symmetry. Cnidaria (jellyfish and corals) have tissue-level organization and radial symmetry. Platyhelminthes (flatworms) have a mesoderm cell layer, simple organ systems, cephalization, and bilateral symmetry.
Do Platyhelminthes have jointed 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.
Why are Platyhelminthes flat?
Flatworms have a flat body because they lack a fluid-filled body cavity. They also have an incomplete digestive system with a single opening. ... The mesoderm layer allows flatworms to develop muscle tissues so they can move easily over solid surfaces.
Are annelids Dorsoventrally flattened?
Leeches lack the hairlike setae of the other annelids and their bodies are somewhat dorsoventrally flattened (i.e., in such a way that the back and belly are close together).
Are flatworms Cephalized?
Flatworms have a cephalized nervous system that consists of head ganglion, usually attached to longitudinal nerve cords that are interconnected across the body by transverse branches.
Are nematodes acoelomates?
The flatworms are acoelomate organisms that include free-living and parasitic forms. The nematodes, or roundworms, possess a pseudocoelom and consist of both free-living and parasitic forms. ... The nematodes and the arthropods belong to a clade with a common ancestor, called Ecdysozoa.
What do Platyhelminthes have that Poriferians and/or cnidarians don t?
Unlike the cnidarians, Platyhelminthes have circular and longitudinal muscle layers. Platyhelminthes exhibit organ-system level of organization, whereas cnidarian have tissue level of organization. Unlike cnidarians, Platyhelminthes possess gonoducts and copulatory organs with very complicated life cycles.
Are Platyhelminthes Protostome or Deuterostome?
Some examples of protostomes are nematodes, arthropods, flatworms, annelids and molluscs. Together with the Deuterostomia and Xenacoelomorpha, these form the clade Bilateria, animals with bilateral symmetry and three germ layers.
Does phylum Platyhelminthes have true tissue?
Yes, members of the phylum Platyhelminthes have true tissues. Tissues are groups of cells that have the same function, similar in structure and also...
Do arthropods have Protostome development?
Like the Lophotrochozoa, Arthropods are triploblastic protostomes. They also have a nervous system with a dorsal "brain", circumpharyngeal nerves and paired ventral nerve cords.
What makes platyhelminthes unique?
The most distinguishing feature of these invertebrates is their flat body. As the body does not have any cavity, they are flat. The body is also not segmented and they do not have specialized systems. Around eighty percent of the flatworms are parasitic in nature, while a few free-form flatworms are also present.
