10.2 动物分类
Section outline
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Plant or animal?
::植物还是动物?. What type? Now that is a good question. This azure vase sponge is an animal, but how is it classified? It is estimated that there are easily over a million of animals on Earth. How are all these species divided into their various classifications?
::哪种类型?现在这是一个很好的问题。这个紫色花草海绵是一种动物,但它是如何分类的?估计地球上很容易有超过100万只动物。所有这些物种是如何按照不同的分类划分的?Classification of Animals
::动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类 动物分类All animals share basic traits. But animals also show a lot of diversity. They range from simple to complex humans.
::所有动物都具有共同的基本特征。但是动物也表现出很多多样性。从简单到复杂的人类,它们都有。Major Animal Phyla
::主要动物植物Members of the animal are divided into more than 30 phyla. Table lists the nine phyla with the greatest number of species. Each of the animal phyla listed in the table has at least 10,000 species.
::动物成员分为30多种植物,表列出了9种动物,其中每种动物至少有10 000种。Phylum Animals It Includes Porifera sponges Cnidaria jellyfish, corals Platyhelminthes , tapeworms, flukes Nematoda Mollusca snails, clams, squids Annelida earthworms , leeches , worms Arthropoda , spiders, , centipedes Echinodermata sea stars, sea urchins, sand dollars, sea cucumbers Chordata , , , , , , mammals Invertebrate vs. Vertebrate
::无脊椎动物与无脊椎动物The first eight phyla listed in Table include only invertebrate animals. Invertebrates are animals that lack a vertebral column , or backbone . The last phylum in the table, the Chordata, also includes many invertebrate species. Tunicates and lancelets are both invertebrates. Altogether, invertebrates make up at least 95 percent of all animal species. The remaining animals are vertebrates . Vertebrates are animals that have a backbone. All vertebrates belong to the phylum Chordata . They include fish, amphibians, reptiles, birds, and mammals.
::表中列出的前八种植物只包括无脊椎动物。无脊椎动物是没有脊椎或脊椎的动物。表的最后一种植物,即Chordata,也包括许多无脊椎物种。肿瘤和长颈动物都是无脊椎动物。总体而言,无脊椎动物占所有动物物种的至少95%。其余动物是无脊椎动物。无脊椎动物是有脊椎的动物。所有脊椎动物都属于植物Chordata。它们包括鱼类、两栖动物、爬行动物、鸟类和哺乳动物。Summary
::摘要-
Vertebrates have a backbone, but invertebrates do not.
::无脊椎动物有脊椎骨 但无脊椎动物没有 -
Except for the chordates, all animal phyla consist only of invertebrates.
::除了染色体外 所有动物的植物 仅由无脊椎动物组成 -
Chordates include both vertebrates and invertebrates.
::和弦包括脊椎动物和无脊椎动物。
Review
::回顾-
State how the phylum Chordata differs from other animal phyla.
::说明植物植物与其它动物植物有何不同。 -
Compare and contrast invertebrates and vertebrates.
::比较和对比无脊椎动物和脊椎动物
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Vertebrates have a backbone, but invertebrates do not.