How does the position of the mouth of Dugesia and flukes compare?
How does the position of the mouth of Dugesia and flukes compare? The mouth of the Dugesia is on the ventral side, close to to middle of the body. While the fluke’s mouth appears to be closer to what one would assume is the head.
Is Dugesia a trematode?
The mostly free-living Turbellaria include the planarian, Dugesia, shown above; these are found in the oceans, in fresh water, and in moist terrestrial habitats, and a few are parasitic. The Trematoda, or flukes, are all parasitic, and have complex life cycles specialized for parasitism in animal tissues.
What two features of Dugesia distinguish its anterior end from its posterior end?
The anterior end of the body is the head and the remainder is the trunk. Girardia tigrina has a pointed triangular head but the head of some species is blunt and rounded. The posterior limit of the head is marked by a pair of lateral, ciliated, chemosensory protrusions, the auricles.
How does the shape of Schistosoma differ from that of other flukes you have studied?
How does the shape of Schistosoma differ from that of other flukes you have studied? Schistosoma differs from other flukes due to their gender. This is because they are male and female in separate individuals. This is known as dioecious, and both of the bodies of male and female differ.
Is Dugesia and Planaria same?
Two common names for freshwater macroturbellarians are triclads and planarians. These include Dugesia and Planaria, which are widely used in high school and college science classes to study simple behavior and tissue regeneration.
Is the gastrovascular cavity of dugesia a simple sac?
Is the gastrovascular cavity of Dugesia a simple sac or highly branched? highly branched sac. The divisions, branching, are advantageous because they provide a greater surface area for nutrient absorption/digestion.
Where is the feeding tube located in dugesia?
A live brown speckled planarian {Dugesia tigrina} feeding on a small piece of Thymus. The planarian’s pharynx, a feeding tube that extends from its gastrovascular cavity (digestive tract) tract), is easily visible connecting the mid-section of the worm to the food.
What is the common name of dugesia?
Planarian
Map to
| Mnemonic i | GIRTI |
|---|---|
| Common name i | Planarian |
| Synonym i | Dugesia tigrina |
| Other names i | ›Girardia trigrina |
| Rank i | SPECIES |
How does the dugesia obtain oxygen?
The planarian does not have gills or lungs, it obtains its oxygen by simple diffusion over its flat body. The dugesia cannot survive outside of the water, so biologists studying it must make sure that the specimen has plenty of water that is aerated. The dugesia does have an excretory system to remove wastes.
How does the Dugesia obtain oxygen?
What is the class of Dugesia?
TurbellariaDugesia / Class
Dugesia (pronounced, /duˈd͡ʒiʒ(i)ə/) is a genus of dugesiid triclads that contains some common representatives of the class Turbellaria. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. Dugesia is best known to non-specialists because of its regeneration capacities.
Is Dugesia Monoecious or dioecious?
They are hermaphrodites. Many species can reproduce both sexually and asexually (by parthenogenesis or by fission).
How does Dugesia tigrina move?
Rhythmic waves of movement can be seen passing backward from the head as it glides. A less common method is crawling. In crawling, Dugesia tigrina lengthens, anchors its anterior end with mucus or by its special adhesive organ, and by contracting its longitudinal muscles pulls up the rest of the body.
What are the characteristics of Dugesia?
Description. Dugesia species have an elongated body with a slightly triangle-shaped head. Usually they have grey, brown or black colors on the dorsal body surface, the ventral surface uses to be paler. These animals have a couple of eyes constituted by a multicellular pigmented cup with many retinal cells to detect the amount…
What is the taxonomy of Dugesia?
Phylogeny and taxonomy. Dugesia species have not enough morphological characters to find out which are the relationships between them. Furthermore, those available use to contradict each other. Dugesia species are identified by the combination of diagnostic characters instead of different apomorphies.
What are the 7 parts of Dugesia?
In this article we will discuss about Dugesia:- 1. Habit and Habitat of Dugesia 2. Structure 3. Body Wall 4. Locomotion 5. Digestive System 6. Respiratoty and Excretory System 7.