英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
cnidarian查看　cnidarian　在百度字典中的解释百度英翻中〔查看〕
cnidarian查看　cnidarian　在Google字典中的解释Google英翻中〔查看〕
cnidarian查看　cnidarian　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Cnidarian | Definition, Life Cycle, Classes, Facts | Britannica
    Cnidarian, any member of the phylum Cnidaria (Coelenterata), a group of more than 9,000 species of mostly marine animals The group includes corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans Learn more about cnidarians in this article
  • Cnidarian - Polyp, Medusa, Tentacles | Britannica
    Cnidarian - Polyp, Medusa, Tentacles: Cnidarians have two cell layers, ectoderm and endoderm (gastrodermis), with the mesoglea between them Medusae have a more highly developed nerve net than do polyps Respiration and excretion are carried out by individual cells Cnidae (nematocysts) are among the most complex intracellular secretion products known
  • Cnidarian - Symbiosis, Adaptations, Predators | Britannica
    Cnidarian - Symbiosis, Adaptations, Predators: Cnidarians are used for food, building material, and jewelry Extracts from many cnidarians have medicinal properties All the species are capable of sexual reproduction Most cnidarian species occupy marine habitats, and many have evolved unique chemical defenses that effectively deter predators
  • Cnidarian - Radial Symmetry, Polyp Medusa | Britannica
    Cnidarian - Radial Symmetry, Polyp Medusa: The exact relationships between the cnidarian groups are unknown The oldest fossils were soft-bodied Representatives of all four modern classes have been identified in the Ediacaran fauna of the Precambrian Period Phylum Cnidaria (Coelenterata) has about 9,000 living species in four classes: Anthozoa; Cubozoa; Hydrozoa; and Scyphozoa
  • Cnidarian - Tentacles, Medusae, Polyps | Britannica
    Cnidarian - Tentacles, Medusae, Polyps: Cnidarians move using jet propulsion, peduncles, pedal disks, or swim by paddling their tentacles or flexing their columns All are carnivores and most use their cnidae and associated toxin to capture food Many of the complex associations cnidarians form with other organisms are mutualistic symbioses
  • Anatomy of cnidarians | Britannica
    cnidarian , or coelenterate , Any of about 9,000 species of mostly marine aquatic invertebrates, constituting the phylum Cnidaria (or Coelenterata), that are unique in possessing specialized stinging cells (cnidocytes) borne on the tentacles
  • Cnidarians Portal | Britannica
    The phylum Cnidaria is made up of more than 9,000 living species, mostly marine animals Corals, jellyfish, sea anemones, and sea fans are all cnidarians
  • Medusa | Sea creature, Marine life, Tentacles | Britannica
    Medusa, in zoology, one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria It is the typical form of the jellyfish The medusoid body is bell- or umbrella-shaped Hanging downward from the centre is a stalklike structure, the manubrium, bearing the mouth at
  • Box jellyfish | Size, Habitat, Venom, Facts | Britannica
    Box jellyfish, (class Cubozoa), any cnidarian (or coelenterate) belonging to the class Cubozoa The class is made up of approximately 50 species, which are known for their semitransparent box-shaped bell and the toxic venom produced by some species Box jellyfish live in warm coastal marine waters
  • Nematocyst | Cnidarian, Cnidarian Venom Coelenterates | Britannica
    Nematocyst, minute, elongated, or spherical capsule produced exclusively by members of the phylum Cnidaria (e g , jellyfish, corals, sea anemones) Several such capsules occur on the body surface Each is produced by a special cell called a cnidoblast and contains a coiled, hollow, usually barbed





中文字典-英文字典  2005-2009