Where are Rhabdites located?
turbellarians
Rhabdites (from Greek, rhabdos, rod) are rodlike structures in the cells of the epidermis or underlying parenchyma in certain turbellarians, and in the epidermis of nemerteans. They are discharged in mucous secretions.
How do Turbellaria affect humans?
They feed on blood cells and cause a disease called schistosomiasis. The symptoms vary, depending on which parts of the body the worms inhabit, but can include fever, abdominal pain, coughing, diarrhea, and enlargement of the liver and spleen.
What are Rhabdites and their role in planarians?
Planaria are soft-bodied, bilateral flatworms of the phylum Platyhelminthes. They are covered in cilia and use ciliary-gliding to traverse the substratum while hunting. Their body surface is covered in a layer of viscous slime primarily derived from specialised secretory granules known as rhabdites.
What is the classification of Turbellaria?
Turbellaria
Turbellaria/Scientific names
What do you mean by Rhabdites?
1 : one of the minute, smooth, rodlike or fusiform structures produced in the cells of the epidermis or in cells sunk within the underlying parenchyma of many turbellarians and a few trematodes and discharged in great numbers in the mucous secretions of these animals.
What is the common name for Turbellaria?
planarians
Integrated Taxonomic Information System – Report
| Common Name(s): | planarians [English] |
| planaires [French] | |
| planária [Portuguese] | |
| turbelário [Portuguese] | |
| turbellarians [English] |
What are the characteristics of Turbellaria?
Class Turbellaria(flatworms)
- True bilateral symmetry.
- Dorso-ventral flattening of the body.
- Unsegmented.
- Ciliated epidermis.
- System of sheathed nerve fibers.
- Parenchyma between the epidermis and the gastrodermis.
- Some cephalization.
- Blind ending gut.
What is the rhabdites function?
Rhabdites are rod-shaped secretory products characteristic of the Turbellaria but also found in nemerteans, gastrotrichs and annelids. It is proposed that the principal function of rhabdites in the worms studied, is adhesion.
What do adhesive glands do?
The adhesive glands secrete an adhesive substance that attaches the anchor cells to a surface, while the releasing glands secrete a substance able to release the anchor cells from surfaces.
What are the features of Turbellaria?
What is the function of a Rhabdites?
What kind of habitat does a Turbellaria live in?
With over 3000 members (species), Turbellaria is a class of the Phylum Platyhelminthes. As such, they are multicellular flatworms characterized by flattened appearance. They can be found in many aquatic habitats as well as given terrestrial environments.
What are the members of the class Turbellaria?
Class Turbellaria : The free living flat worms. Members of this class are mostly free-living. They are bottom dwellers in freshwater and marine environments. They crawl on stones, sand, or vegetation. Turbellarians are named for the turbulence.
What makes a Turbellaria different from other flatworms?
As such, Turbellaria species lack a coelom (a body cavity located between the body wall and intestinal canal in most animals). They have sub-epidermal rhabdites in their ciliated epidermis that distinguish this class from other flatworms. They lack an anal opening.
Where does the free end of a Turbellaria tube?
It may be a simple and ciliated tube or it may be a complex organ developed by the folding of muscle layers. In this case the free end of the tube lies in a pharyngeal sheath. It can project out of the mouth during feeding. (d) Digestion: Food digestion is partially extracellular.