vegetal pole

简明释义

植物极

英英释义

例句

1.The embryo develops at the vegetal pole, which is rich in nutrients.

胚胎在植物极发育，那里富含营养。

2.In frog eggs, the vegetal pole is opposite the animal pole and has distinct properties.

在青蛙卵子中，植物极与动物极相对，并具有不同的特性。

3.The vegetal pole plays a crucial role in determining the future development of the organism.

植物极在决定生物未来发育中起着关键作用。

4.During cleavage, the cells at the vegetal pole divide more slowly than those at the animal pole.

在卵裂过程中，植物极的细胞分裂速度比动物极的细胞慢。

5.Researchers observed that the vegetal pole contains factors that influence cell differentiation.

研究人员观察到，植物极含有影响细胞分化的因子。

作文

In the study of biology, particularly in the field of embryology, the term vegetal pole refers to a specific region of an egg or embryo that is typically rich in yolk. This area plays a crucial role in the early stages of development, influencing the formation of various tissues and structures in the organism. The vegetal pole is usually opposite the animal pole, which is characterized by a lower concentration of yolk and is often where the embryo's future head will develop. Understanding the significance of the vegetal pole is essential for comprehending how different organisms develop from a single fertilized egg into complex multicellular beings.The presence of yolk at the vegetal pole provides essential nutrients that support the developing embryo during its initial growth phases. In many species, the distribution of yolk can affect the cleavage pattern during cell division, leading to differences in how the cells will differentiate later on. For example, in amphibians such as frogs, the yolk-rich vegetal pole contributes to the formation of the gut and other internal structures, while the animal pole, with its lower yolk content, gives rise to the ectoderm, which will form the skin and nervous system.Moreover, the positioning of the vegetal pole is not just a passive characteristic; it actively influences the developmental fate of the cells around it. This phenomenon is known as 'localized cytoplasmic determinants,' where specific molecules are concentrated at the vegetal pole and dictate the developmental pathways of adjacent cells. This concept highlights the intricate interplay between cellular location and fate, emphasizing the importance of the vegetal pole in shaping the organism's body plan.Research has shown that manipulating the factors present at the vegetal pole can lead to significant changes in development. For instance, scientists have experimented with injecting various substances into the vegetal pole of frog eggs, resulting in altered patterns of development that can provide insights into fundamental biological processes. These experiments underscore the pivotal role of the vegetal pole in embryonic development and how it serves as a focal point for organizing the embryo's structure.In conclusion, the vegetal pole is more than just a region of an egg; it is a vital component in the orchestration of embryonic development. Its rich supply of yolk and the localized determinants it harbors are instrumental in guiding the fate of cells and the overall morphology of the organism. As we continue to explore the complexities of developmental biology, the understanding of the vegetal pole remains a key area of focus, revealing the wonders of life’s beginnings and the intricate processes that lead to the formation of diverse forms of life on our planet.

在生物学的研究中，尤其是在胚胎学领域，术语vegetal pole指的是卵子或胚胎的特定区域，该区域通常富含卵黄。这个区域在发育的早期阶段发挥着至关重要的作用，影响着有机体各种组织和结构的形成。vegetal pole通常与动物极相对，后者的卵黄浓度较低，通常是胚胎未来头部发育的地方。理解vegetal pole的重要性对于理解不同有机体如何从单一受精卵发展成复杂的多细胞生物至关重要。vegetal pole处的卵黄提供了支持发育中的胚胎在初始生长阶段所需的基本营养。在许多物种中，卵黄的分布会影响细胞分裂期间的裂变模式，从而导致细胞在后期分化时的差异。例如，在青蛙等两栖动物中，富含卵黄的vegetal pole有助于形成肠道和其他内部结构，而卵黄含量较低的动物极则产生外胚层，形成皮肤和神经系统。此外，vegetal pole的位置不仅仅是一个被动特征；它主动影响周围细胞的发育命运。这种现象被称为“局部细胞质决定因素”，其中特定分子集中在vegetal pole处并决定邻近细胞的发育路径。这一概念突显了细胞位置与命运之间错综复杂的相互作用，强调了vegetal pole在塑造有机体体型中的重要性。研究表明，操纵vegetal pole处的因素可以导致发育中的重大变化。例如，科学家们曾尝试向青蛙卵子的vegetal pole注入各种物质，结果导致发育模式的改变，这些改变可以提供有关基本生物过程的见解。这些实验强调了vegetal pole在胚胎发育中的关键作用，以及它如何成为组织结构的组织点。总之，vegetal pole不仅仅是卵子的一部分；它是胚胎发育协调中的重要组成部分。它丰富的卵黄供应和其所包含的局部决定因素在引导细胞命运和有机体整体形态方面发挥着重要作用。随着我们继续探索发育生物学的复杂性，对vegetal pole的理解仍然是一个关键关注领域，揭示了生命起源的奇迹以及导致我们星球上多样生命形式形成的复杂过程。