How does porifera Cnidaria and platyhelminthes differ?
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.
What is the main difference between the porifera and Cnidaria phylum?
Cnidaria and porifera are two different phyla. Cnidarians have Cnidocytes but not the poriferans. Cnidarians have well-organized organ systems but not the poriferans; on the other hand, poriferans have an efficient tunnel system made up of pores but not the cnidarians.
What are the main differences among porifera Cnidaria and ctenophora?
Porifera, Cnidaria, and Ctenophora are the most primitive clade of metazoans. They distinguish themselves from the other metazoans by their lack of bilateral symmetry. Inside their clade, each phylum is clearly distinguished by its general features.
In what ways are Platyhelminthes more complex than porifera and cnidaria?
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 nematodes and Platyhelminthes?
Nematodes are called roundworms while Platyhelminthes are called flatworms. 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.
Are Porifera symmetrical?
Phylum Porifera (sponges): Aquatic animals with radial symmetry or irregular shapes.
What type of body cavity do Porifera have?
Taxonomic level: phylum Porifera; grade of construction: cellular, with no distinct tissues or organs; symmetry: variable; type of gut: none; type of body cavity other than gut: none; segmentation: none; circulatory system: none; nervous system: none; excretion: diffusion from cell surface.
What are the special features of Porifera and cnidaria?
| Porifera | Cnidaria |
|---|---|
| 1. Animals are asymmetrical. | 1. Animals are radially symmetrical. |
| 2. Water canal system is well-developed. | 2. Water canal system is absent. |
| 3. They show the presence of choanocytes or collar cells. | 3. They show the presence of cnidoblasts or nematocytes. |
How are animals of Porifera differ from those of cnidaria?
Animals of the phylum Porifera have an asymmetrical body with the cellular level of body organisation, whereas cnidarians have radial symmetry and tissue level of body organisation. Cnidarians have nematocysts, whereas poriferans have choanocytes performing different functions.
What is the difference between porifera and Coelenterata?
The key difference between Porifera and Coelenterata is that Porifera consist of numerous pores throughout the body, working as water intake and outlet openings whereas Coelenterata consist of a single opening on the body working as mouth/anus.
What are two differences between the jellyfish and ctenophores?
What are the two differences between the jellyfish and Ctenophores? Etenophores lack bag-like cnidarian body shape and stinging cells. Have “comb-rows” of cilia on bodies for movement. A round body with a complete, one-way digestive system.
