| 词汇 | example_english_germ-layer |
| 释义 | germ layercollocation in Englishmeanings of germand layerThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with layer or germ. germ noun uk /dʒɜːm/ us /dʒɝːm/ a very small organism that ... See more at germ layer noun[C] uk /ˈleɪ.ər/ us /ˈleɪ.ɚ/ a level of material, such as a type of rock or gas, that is different from the material above or below it, or a thin sheet of ... See more at layer Examples of germ layerThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Only with the germ layers, it was assumed, is the egg sufficiently fixed as to its later fate, and only at that stage is it subject to true adaptation. In addition, by the early 1880s many embryologists had come to assume that the first important stage of development occurs when the germ layers have been established. Muse cells are able to generate cells representative of all three germ layers from a single cell both spontaneously and under cytokine induction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. All the more complex animals (from flat worms to humans) are triploblastic with three germ layers (a mesoderm as well as ectoderm and endoderm). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In triploblastic organisms, the three germ layers are called endoderm, ectoderm, and mesoderm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For instance, skeletal muscle, kidney and spleen are formed of the germlayer mesoderm, whereas the liver originates from the endoderm. Only as this germlayer doctrine came to be widely called into question in the course of the 1880s did considerable attention focus on those earliest stages. The once superficial cells of the animal pole are destined to become the cells of the middle germlayer called the mesoderm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. An ancient role for nuclear beta-catenin in the evolution of axial polarity and germlayer segregation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Simpler animals, such as sea sponges, have one germlayer and lack true tissue organisation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The cellular tissues that ultimately become teeth originate from the embryonic germlayer, the ectoderm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They found trandifferentiation within germlayer and between germ layers. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Notable events during differentiation include the formation of the germ layers, extraembryonic membrane and organs. During the early stages of development, the primitive streak is the structure that will establish bilateral symmetry, determine the site of gastrulation and initiate germlayer formation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Like the other calcareous layers of the shell, the nacre is created by the epithelial cells (formed by the germlayer ectoderm) of the mantle tissue. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. She worked extensively on the developmental genetics of axial patterning, germlayer specification, and other phenomena of gastrulation in mammals, including demonstrating that the node is the organizer in mammals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Whereas earlier development merely involves growing bigger, germ layers hold the key to later development and differentiation. The appearance of the germ layers symbolises the initiation of differentiation. It is in all three germ layers and neural crest cells. In these three phyla of organisms, the mesoderm (the middle germlayer) forms as a solid mass of migrated cells from the single layer of the gastrula. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are only two main germ layers, the ectoderm and endoderm, with only scattered cells between them. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The body is triploblastic, i.e. all three germ layers are well-developed, and tissues form distinct organs. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Cells of similar types migrated to their correct location and reaggregated to form germ layers in their developmentally correct positions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Want to learn more? Go to the definition of germ Go to the definition of layer See other collocations with layer See other collocations with germ |
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