chordates
简明释义
n. 脊索动物；脊睡物门；脊睡物（chordate的复数）
英英释义
单词用法
同义词
| 脊椎动物 | Vertebrates include fish, amphibians, reptiles, birds, and mammals. | 脊椎动物包括鱼类、两栖动物、爬行动物、鸟类和哺乳动物。 | |
| 有脊柱的动物 | Animals with a backbone are generally more complex than invertebrates. | 有脊柱的动物通常比无脊椎动物更复杂。 |
反义词
| 无脊椎动物 | Invertebrates make up the majority of animal species on Earth. | 无脊椎动物占据了地球上大多数动物物种。 | |
| 非脊索动物 | 非脊索动物包括水母和昆虫等动物。 |
例句
1.Chordates are bilaterally symmetrical, triploblastic, segmented coelomates.
脊索是双边对称的，三叶裂的，分段的腔壁。
2.Most chordates have a high-pressure, closed circulation with a ventral heart.
大多数脊索动物循环具有高压的、封闭的循环系统，心脏位于腹面。
3.Chordates are bilaterally symmetrical, triploblastic, segmented coelomates which demonstrate a deuterostomic pattern of early embryonic development.
脊索动物两侧对称、三胚层，分节的体腔，在胚胎发育的早期过程中，显示为后口类型。
4.Chordates are bilaterally symmetrical, triploblastic, segmented coelomates which demonstrate a deuterostomic pattern of early embryonic development.
脊索动物两侧对称、三胚层，分节的体腔，在胚胎发育的早期过程中，显示为后口类型。
5.Birds are warm-blooded chordates that can fly.
鸟类是能够飞行的温血脊索动物。
6.Fish, amphibians, reptiles, birds, and mammals are all examples of chordates.
鱼类、两栖动物、爬行动物、鸟类和哺乳动物都是脊索动物的例子。
7.The evolutionary history of chordates dates back to over 500 million years ago.
脊索动物的进化历史可以追溯到超过五亿年前。
8.Humans are a type of chordate known as mammals.
人类是一种被称为哺乳动物的脊索动物。
9.All mammals are classified as chordates.
所有的哺乳动物都被归类为脊索动物。
作文
The kingdom of animal life is incredibly diverse, and among its many branches, one of the most fascinating groups is that of the chordates (脊索动物). These animals are characterized by having a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some stage of their development. This unique set of features distinguishes chordates from other animal groups and places them in a critical position in the evolutionary tree of life.Chordates include a wide variety of species, ranging from the simplest tunicates to the more complex mammals. The diversity within this group is remarkable; it encompasses fish, amphibians, reptiles, birds, and mammals. Each of these subgroups has adapted to their environments in unique ways, showcasing the incredible versatility of chordates.Fish, for instance, are primarily aquatic and have developed gills for breathing underwater, while amphibians, such as frogs, have a dual life cycle that includes both aquatic and terrestrial phases. Reptiles, like snakes and lizards, have adapted to land with tough, scaly skin that prevents water loss. Birds have evolved feathers that enable flight, and mammals possess fur or hair along with mammary glands for nurturing their young. This adaptability highlights the evolutionary success of chordates.One of the most significant aspects of chordates is their evolutionary history. Fossil evidence suggests that the earliest chordates appeared over 500 million years ago during the Cambrian period. This long history has allowed them to evolve into numerous forms, each specializing in different ecological niches. For example, the transition from water to land was a pivotal moment in chordate evolution, leading to the emergence of amphibians and later, reptiles.In addition to their physical adaptations, chordates exhibit a range of behaviors that are equally fascinating. Many species engage in complex social interactions, such as pack hunting in wolves or intricate mating displays in birds. These behaviors not only enhance their survival but also contribute to the rich tapestry of life on Earth.Moreover, chordates play vital roles in their ecosystems. They are often key predators or prey, helping to maintain the balance within food webs. For instance, fish populations can significantly influence aquatic ecosystems, while birds may control insect populations. Mammals, too, contribute to their environments by dispersing seeds and pollinating plants.Despite their success and adaptability, chordates face numerous threats today. Habitat destruction, climate change, and pollution are just a few of the challenges that jeopardize their survival. Conservation efforts are crucial to protect these diverse species and their habitats, ensuring that future generations can appreciate the wonders of chordates.In conclusion, chordates (脊索动物) represent a remarkable group of animals that showcases the complexity and diversity of life on Earth. Their unique characteristics, evolutionary history, and ecological roles highlight their importance in the natural world. As we continue to learn more about these fascinating creatures, it is essential to recognize the need for their conservation and protection, ensuring that they thrive for generations to come.
