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https://skeletalphylum.weebly.com/platyhelminthes.html
They are a phylum of triploblastic acoelomate invertebrate animals. The word platyhelminthes comes from the Greek words 'platy' meaning flat and 'helmins' meaning worm. Their bodies are soft, unsegmented, dorsoventrally flattened with bilateral symmetry and resemble ribbons. Mesenchyme, which is a connective tissue,...
https://study.com/academy/lesson/platyhelminthes-body-cavity-movement.html
Platyhelminthes are a phylum of worms that are flat in shape, the majority of which are parasitic in nature. Their flat shape comes from the fact that they are acoelomates (having no coelom, or fluid-filled body cavity). This means they must utilize other means …
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_General_Biology_(Boundless)/28%3A_Invertebrates/28.3%3A_Superphylum_Lophotrochozoa/28.3B%3A_Phylum_Platyhelminthes
Nov 19, 2019 · The mesodermal tissues include mesenchymal cells that contain collagen and support secretory cells that secrete mucus and other materials at the surface. The flatworms are acoelomates: their bodies are solid between the outer surface and the cavity of the digestive system.
http://ksuweb.kennesaw.edu/~jdirnber/InvertZoo/LecPlatyhel/Platyhel.html
Platyhelminthes are a diverse group of flatten worms with a fairly simple body plan 18,500 species Body Plan. Dorso-ventrally flattened, distinct posterior …
https://animaldiversity.org/accounts/Platyhelminthes/
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. Excretion and osmoregulation by flatworms is controlled by "flame cells" located in protonephridia (these are absent in …
https://quizlet.com/272929592/exam-2-animal-phyla-and-body-systems-flash-cards/
A closed circulatory system which is a closed-loop system in which the blood is not moving freely in a cavity blood is contained inside blood vessels, circulating unidirectionally (in one direction) from the …
https://en.wikipedia.org/wiki/Phylum_platyhelminthes
The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates. Unlike other bilaterians, they are acoelomates, and have no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion. The digestive cavity …Clade: Rouphozoa
https://quizlet.com/127931173/phylum-platyhelminthes-planarians-dugesia-flash-cards/
Start studying Phylum Platyhelminthes - Planarians (Dugesia). Learn vocabulary, terms, and more with flashcards, games, and other study tools.
https://www.britannica.com/animal/flatworm
Flatworm, 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.
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