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Acoelomates:     more detail

Kingdom Animalia: Acoelomates and Pseudocoelomates: Separate from Laboratory Outlines in Biology VI by Peter Abramoff, Robert G. Thomson, 1995-01-01 Reproduction of Marine Invertebrates: Acoelomate and Pseudocoelomate Metazoans v. 1 The Invertebrates: Volume II, Platyhelminthes and Rhynchocoela. The Acoelomate Bilateria by L. H. Hyman, 1951-01-01

lists with details

41. NSDL UPortal 2.0.2
    Minor Invertebrate Phyla Acoelomate Phyla - An introduction to the acoelomates, with links to some very nice photos of Platyhelminthes and Nemertea  
    http://srb.npaci.edu/cgi-bin/nsdl.cgi?uid=/2004-07-07T21:53:40Z/41C2097BC6D982D5

42. VirtualNurse.com - Acoelomates
    Top quality information about acoelomates. Medical acoelomates powered by PHP Open Directory Script. Terms of Use Contact Info Privacy Policy  
    http://www.virtualnurse.com/index.php?c=Science/Biology/Flora_and_Fauna/Animalia

43. Grade Acoelomates - Classification - Systema Naturae 2000
    Grade acoelomates . Biota Domain Eukaryota - eukaryotes Kingdom Animalia - animals Grade Metazoa - multicellular animals Grade Eumetazoa - eumetazoans  
    http://sn2000.taxonomy.nl/Main/Classification/102405.htm

44. Coeloms And Pseudocoeloms
    Acoelomate animals are called acoelomates and they have no true body cavity. The acoelomate phyla are Placozoa , Porifera , Cnidaria , Ctenophora  
    http://www.earthlife.net/inverts/coelom.html
    
    Extractions: Throughout these invertebrate pages you will find reference to animals as being Coelomate, Pseudocoelomate and Acoelomate. All these terms, and others explained below are to do with the nature of the body cavity of the animal. Simple animals do not have a body cavity but higher animals like mammals do. In mammals the body cavity is called a Coelom and it is the area that contains all heart and lungs as well as the gut which is a cavity in its own rite. The words used to define different body cavities relate to how the cavity comes into being during the development of the embryo as well as to its final observable structure. Below university level education it is not terribly important to understand the differences but I have put these explanations up separately from the glossary to make it easier to use. Also because of the length of this explanation I am only typing it out once here rather than each time I have used such a term. Pseudocoelomate animals have a pseudocoelom. They have a body cavity but it is not lined with mesodermal cells. It exists between the mesoderm and the endoderm that makes up the walls of the gut. It does not have supportive mesodermal mesenteries. The pseudocoelomate phyla are Gastrotricha, Rotifera, Nematoda, Nematomorpha, Kinorhyncha, Loricifera, Acanthocephala.

45. Chapter 29 - Animal Kingdom
    Parazoa to acoelomates Pseudocoelomates EucoelomatesProtostome . classification is questionable; no pseudocoele; body is acoelomate; has coelom-like  
    http://project.bio.iastate.edu/Articulation/ISU/Freshman/Biol_201/Outlines/chp29

46. Cantufind.com Brings You :: Acoelomates
    The acoelomates Category does not have any links within it. Why not add your link today by Clicking here. Home Feedback Sitemap Support About Us  
    http://www.cantufind.com/Science/Biology/Flora_and_Fauna/Animalia/Acoelomates/

47. Overview Of The Animal Kingdom
    The acoelomates have no body cavity surrounding the gut. Pseudocoelomates have a body cavity surrounding the gut but the gut itself is not surrounded by  
    http://www.bumblebee.org/invertebrates/Animalia.htm
    
    Extractions: Enter your search terms Web www.bumblebee.org Submit search form The Kingdom Animalia is divided into Phyla (see below), and is believed to have evolved from single-celled protist ancestors about 1000 million years ago. There are generally thought to be about 35 extant Phyla, but this number varies according to different workers. Taking into account fossil evidence and the length of time assumed necessary for evolution; it is probable that most of the Phyla were in existence by the Cambrian . Two of these Phyla, the Porifera and the Placozoa (see below right), are sufficiently different from the others to be grouped apart, dividing the Kingdom into two Sub-kingdoms; the Sub-kingdom Parazoa containing the Porifera and the Placozoa, and the Sub-kingdom Eumetazoa containing all the other Phyla. CHARACTERISTICS Multicellular, so different cells can specialise.

48. Science/AAAS | Science Magazine: Sign In
    According to the traditional intellectual bias for increasing complexity in evolution, the acoelomates were seen as emerging at the base of the bilaterian  
    http://www.sciencemag.org/cgi/content/full/280/5362/397?ijkey=1e2bdf8bb45658ccb0

49. Biology 203 Lab
    bullet. Pattern of coelom development (acoelomate, pseudocoelomate or true coelomate) 1) No body cavities or blood vascular system acoelomates  
    http://biology.unm.edu/ccouncil/Biology_203/Summaries/SimpleAnimals.htm
    
    Extractions: Biology 203 Lab Simple Animals Useful Reading Symmetry – general, structured body plan. See radial and bilateral symmetry below. Coelom – fluid-filled body cavity surrounded by mesoderm-derived tissue. Diploblastic – having only two layers of cells during development: the endoderm and ectoderm. Triploblastic – having three layers of cells during development: the endoderm, ectoderm, and mesoderm. Heterotroph – an organism which gets its energy by ingesting food. Hermaphrodite – an individual which can produce both eggs and sperm. Classification In Kingdom Animalia, all taxa are eukaryotic and lack cell walls, multicellular, and generally heterotrophic. Evolutionary relationships among animals have been examined using fossil evidence, anatomy, development, and genetics. You should familiarize yourself with the major anatomical and developmental differences that define animal phyla. In this section, we will look at the simplest and earliest animals – those which have the simplest body structure and tissue organization. The traditional phylogeny is shown below. It is based on the following anatomical / developmental traits:

50. Significance Of Muscle Cells For The Origin Of Mesoderm In Bilateria1, The | Int
    If acoelomates were derived from coelomates by progenesis, then the fibertype muscles of acoelomates could be products of foreshortened differentiation of  
    http://findarticles.com/p/articles/mi_qa4054/is_200302/ai_n9184803
    
    Extractions: INTRODUCTION The nature of the original mesodermal cells in triploblasts is also emerging from studies of the cytology and embryology of lower bilaterians. For example, Ladurner and Rieger (2000) and Rieger and Ladurner (2001) have shown how muscle cells arise in embryos of acoels and other lower worms and become positioned between ecto- and endoderm. Cell-lineage studies of ctenophores (Martindale and Henry, 1999; Henry and Martindale, 2001), polyclad flatworms (Boyer et al., 1996, 1998), nemertines (Henry and Martindale, 1998) and acoelomorph flatworms (Henry et al., 2000) reveal important distinctions between mesodermal cells arising from ectoderm and those from endoderm. And studies of the arrangement of body-wall muscles in platyhelminths (Tyler and Rieger, 1999; Tyler, 2001; Hooge, 2001) and their embryonic development (Ladurner and Rieger, 2000) show a spectrum of function and position that provide models for the ancestral bilaterian.

51. AP~Invertebrates
    Distinguish among acoelomate, pseudocoelomate, and coelomate . Phylum Platyhelminthes flatworms are dorsoventrally flattened acoelomates  
    http://www.jdenuno.com/APBiology/AP~Invert.htm
    
    Extractions: First Class Chat Chapter Objectives List characteristics that distinguish animals from organisms in the other 4 kingdoms Distinguish betwen radial and bilateral symmetry Outline major phylogenetic branches of the animal kingdom which are based on grade of organization symmetry and embryonic germ layers absence or presence of a body cavity protostome~deuterostome dichotomy Distinguish among acoelomate, pseudocoelomate, and coelomate DIstinguish between spiral and radial cleavage determinate and indeterminate cleavage schizocoelous and enterocoelous coelom formation Compare developmental differences between protostomes and deuterostomes includng plane of cleavage determination fate of balstopore coelom formatio Compare and contrast 2 hypotheses about animal origins from unicellular ancestors synctial hypothesis colonial hypothesis Explain why it is difficult to resolve what the 1st animals looked like Describe 2 views about discontinuities between Edicaran and Cambrian forms

52. Adventist Youth Honors Answer Book/Nature/Worms - Advanced - Wikibooks, Collecti
    acoelomates lack internal body cavities. acoelomates include flatworms and ribbon worms. For example, flatworms have organs, but do not have a fully formed  
    http://en.wikibooks.org/wiki/Adventist_Youth_Honors_Answer_Book/Nature/Worms_-_A
    
    Extractions: This honor was introduced in 2006, but the patch for it is not yet available. Please do not request it from Advent Source until after December 2007. The Monogenea, Trematoda, and Cestoda are the three major classes of parasitic flatworms, though the Turbellaria used to be considered a part of this class* Monogeneans are largely ectoparasites on vertebrates like fishes; trematodes are the flukes, most of which live inside the organs of a variety of vertebrates as adults; and cestodes are the tapeworms, living in the intestines of a variety of vertebrates as adults (this is why your pets get annual shots—so that they don’t experience cestodes or trematodes—otherwise, pets could die as a result of an infestation of these worms.) All Platyhelminthes are hermaphroditic in nature, meaning they can fertilize themselves.

53. A Phylogenetic Analysis Of Myosin Heavy Chain Type II Sequences Corroborates Tha
    Within this new taxonomic frame, acoelomate Platyhelminthes, An important corollary is that acoelomates and pseudocoelomates are not basal but derived  
    http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=123241

54. Untitled Document
    The 9000 species of radially symmetrical acoelomates fall into 2 phyla o Cnidarians are radically symmetrical acoelomates w/ true tissues but no organs  
    http://technology.polyprep.org/webdesign2005/ch23/studyguide redo.htm

55. Major Points By Phylum
    acoelomates/pseudocoelomates/coelomates bilateral symmetry; cephalization. acoelomates (triploblastic but with no coelomic body cavity)  
    http://www.sci.sdsu.edu/classes/bio201/study guide.html
    
    Extractions: INVERTEBRATE DIVERSITY SECTION (Biol.201), Spr 2000 Dr. Kathy S. Williams (email kwilliams@sunstroke.sdsu.edu Return to Invertebrate Introduction Return to Syllabus MAJOR POINTS BY MAJOR TAXA You should understand the relevance of these characteristics and functions to each animal group listed. For example, you can ask yourself, "What does aquaferous system mean and what does it have to do with Porifera? How does it compare to systems in other animals?" Try writing an answer without looking at the book or you r notes, then check yourself by checking with the text, the lab manual, or you notes. This is not intended to be a complete list, nor are the terms listed under ALL of the headings to which they apply. Rather, this is a GUIDE to help you organize your studies and test yourself. If you have any questions about the accuracy of your understanding and writing, PLEASE see me or even just give it to me and I’ll look it over! Porifera simple body organization; aquaferous system; simple feeding; asymmetric bodies

56. Dr. Forbes Lectures For Biology 252 DIVERSITYANIMAL PROTISTS AND
    E.g., acoelomates v. coelomates, pseudocoelomates v. eucoelomates, schizocoels v. considered to be the most primitive of the Bilateria * acoelomate  
    http://www.navi.net/~rsc/biol252/lectures.txt

57. Body Cavity - Wikipedia, The Free Encyclopedia
    Acoelomate animals, like flatworms, have no body cavity at all. Therefore, acoelomate organs are not protected from crushing forces applied to the  
    http://en.wikipedia.org/wiki/Body_cavity
    
    Extractions: Jump to: navigation search Picture of Human body cavities - dorsal body cavity to the left and ventral body cavity to the right. By the broadest definition, a body cavity is any fluid filled space in a multicellular organism . However, the term usually refers to the space, located between an animal ’s outer covering ( epidermis ) and the outer lining of the gut cavity, where internal organs develop. "The body cavity" of human body cavities normally refers to the ventral body cavity , because it is by far the largest one in area. The type of body cavity places an organism into one of these three groups: Coelomates (also known as eucoelomates"true coelom") have a fluid filled body cavity called a coelom pronounced /ˈsiːləm/ ) with a complete lining called peritoneum derived from mesoderm (one of the three primary tissue layers ). The complete mesoderm lining allows organs to be attached to each other so that they can be suspended in a particular order while still being able to move freely within the cavity. Most bilateral animals, including all the vertebrates , are coelomates.

58. Access To Articles : Nature Genetics
    This first largescale database for a bilaterian acoelomate should enhance our understanding of the evolution, biology and adaptation to parasitism of these  
    http://www.nature.com/ng/journal/v35/n2/full/ng1237.html
    
    Extractions: nature.com homepage Login ... Browse by subject Search All of nature.com Advanced search Most users gain access to full text articles through a site license. This is available to institutional customers only. For further information visit the Librarian Gateway. Full-text articles are also available through a number of other options: Price: US$32 In order to purchase this article you must be a registered user. Register now Select this option to purchase a personal subscription to Nature Genetics Subscribe now to Nature Genetics Personal subscribers to Nature Genetics can view this article. To do this, you need to associate your subscription with your registration via the My Account page. If you already have an active online subscription, login below to access your account. Login via Athens E-mail Password Save your password What happens if I save my password?

59. Acoelomate
    Acoelomate,biological,biology dictionary,biology terminology,biology terms,biology abbreviations.  
    http://www.bio-medicine.org/biology-dictionary/Acoelomate/
    
    Extractions: TAG: Acoelomate Other biology dictionary Ichthyology Identity ... Inbreeding coefficient (Date:4/3/2008)..., An independent scientific analysis led by Unive... researchers gives the Chesapeake Bay a C-minus in...ere slightly better than the previous year, but fa... Chesapeake Bay Health Report Card shows condition...g here from which we can take great comfort, said ... (Date:4/3/2008)..., Scientists have discovered a new technique for ...g pancreatic tissue in what could prove a signific...ts for diabetes. , The University of Manchester ... Sheffield, were able to genetically manipulate th...otein known as a transcription factor. , Stem ce...

60. Acoelomate - Definition Of Acoelomate By The Free Online Dictionary, Thesaurus A
    Definition of acoelomate in the Online Dictionary. Meaning of acoelomate. What does acoelomate mean? acoelomate synonyms, acoelomate antonyms.  
    http://www.thefreedictionary.com/acoelomate
    
    Extractions: encyclopedia Also found in: Medical Wikipedia 0.04 sec. write_ads(AdsNum, 0) a·coe·lo·mate -s l -m t n. An animal that lacks a coelom. Acoelomates, which include the flatworm, fluke, tapeworm, and ribbon worm, exhibit bilateral symmetry and possess one internal space, the digestive cavity. [New Latin Acoel mata group name a- + Greek koil ma , koil mat- cavity ; see coelom a·coe lo·mate (-l -m t) adj.

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