Table of Contents
Where do Planarians belong?
Planaria are common to many parts of the world, living in both saltwater and freshwater ponds and rivers. Some species are terrestrial and are found under logs, in or on the soil, and on plants in humid areas.
What phylum and class do flatworms belong to?
Flatworm
| Flatworm Temporal range: Possible Cambrian, Ordovician and Devonian records | |
|---|---|
| Clade: | Rouphozoa |
| Phylum: | Platyhelminthes Claus, 1887 |
| Classes | |
| Traditional: Turbellaria Trematoda Monogenea Cestoda Phylogenetic: Catenulida Rhabditophora |
In what phylum do you find Planarians and tapeworms?
Phylum Platyhelminthes
The Phylum Platyhelminthes (flatworms) includes planarians (Class Turbellaria), tapeworms (Class Cestoda), and flukes (Class Trematoda). The planarians are harmless, free-living flatworms. They live in an aquatic environment (freshwater or marine) or on moist soil.
Are Planaria vertebrates?
Invertebrates such as planaria and hydra have long been favorite research models for whole body regeneration (Birnbaum and Sanzhez-Alvarado, 2008).
What is the phylum of a tapeworm?
Flatworm
Tapeworms/Phylum
What organisms belong to phylum Platyhelminthes?
Platyhelminthes Examples
- Taenia (Tapeworms)
- Fasciola (Liver fluke)
- Taenia saginata (Beef tapeworm)
- Echinococcus granulosus – The dog tapeworm.
- Planeria (freshwater flatworm)
- Opistorchis.
Which of the following belong to phylum Platyhelminthes?
The Platyhelminthes includes three classes: the Turbellaria (free-living flatworms), the Trematoda (flukes), and the Cestoda (tapeworms).
In what way does the phylum Platyhelminthes differ from the phylum Cnidaria?
Cnidarians are diploblastic, whereas Platyhelminthes are triploblastic. Platyhelminthes possess bilaterally symmetrical, soft, worm-like elongated bodies, whereas cnidarian possess radially symmetrical, soft, medusa-like or polyp-like body forms. Cnidarians have cnidocytes, unlike the Platyhelminthes.
How are nematodes and Platyhelminthes similar?
Like the flatworms, nematodes are bilaterally symmetrical. They take their name from their round body cross-sectional shape. Unlike the flatworms in which food and waste enter and exit from the same opening, nematodes have a complete digestive system.
What is intestine in planaria?
The planarian digestive system consists of a highly branched intestine comprised of absorptive phagocytes that take up food particles and secretory goblet cells that produce digestive enzymes (Bowen, Ryder, & Thompson, 1974; Corrales & Gamo, 1986; Garcia-Corrales & Gamo, 1988; Ishii, 1965).
Is Planaria a vertebrate or invertebrate?
What is the phylum name for roundworms?
phylum Nematoda
nematode, also called roundworm, any worm of the phylum Nematoda. Nematodes are among the most abundant animals on Earth.
What are facts about planaria?
Facts About Planarian Regeneration If its neoblasts are destroyed by radiation, a planarian that has been cut is unable to regenerate missing parts and dies within a few weeks. If new neoblasts are transplanted into an irradiated animal, it regains its ability to regenerate. When part of a planarian is amputated, neoblasts travel to the wound and form a structure called a blastema.
What class is planaria?
Planarian, any of a group of widely distributed, mostly free-living flatworms of the class Turbellaria ( phylum Platyhelminthes).
How do planaria reproduce?
Planarians reproduce by two distinct strategies: asexual and sexual reproduction ( Hyman, 1951 ). Asexual planarians reproduce clonally by fissioning and subsequently regenerating two genetically identical animals. Sexual planarians reproduce as cross-fertilizing hermaphrodites that lay embryo-containing egg capsules.
How do planarians eat?
Planaria eat by extending their pharynx out and sucking up food. Here they can be seen eating boiled egg yolk. Planaria are studied for their remarkable regeneration abilities. If you cut a planarian worm into several pieces, each piece will regenerate into a new worm. The magnification is seen in the bottom right hand corner of each shot.