animal pole

简明释义

动物极

英英释义

例句

1.In many species, the animal pole is where the majority of the cytoplasm is located.

在许多物种中，动物极是细胞质主要所在的位置。

2.The animal pole is often associated with the future head region of the developing organism.

动物极通常与发育生物体的未来头部区域相关联。

3.Research indicates that cells at the animal pole divide more rapidly than those at the opposite end.

研究表明，动物极的细胞分裂速度比相对另一端的细胞快。

4.During the fertilization process, the sperm typically enters the egg near the animal pole.

在受精过程中，精子通常在蛋黄的动物极附近进入卵子。

5.The scientist observed the development of the embryo at the animal pole.

科学家观察了胚胎在动物极的发育情况。

作文

In the fascinating world of biology, the concept of the animal pole (动物极) plays a crucial role in understanding the early stages of embryonic development. The animal pole refers to one of the two distinct regions of an egg cell, the other being the vegetal pole. These regions are defined based on the distribution of yolk and the subsequent developmental processes that take place in the embryo. The animal pole is typically characterized by a lower concentration of yolk, which allows for more active cellular division and differentiation. This is particularly important as it sets the stage for the formation of various tissues and organs in the developing organism.During fertilization, the sperm cell merges with the egg at the animal pole, initiating a series of rapid cell divisions known as cleavage. During this process, the cells at the animal pole divide more frequently than those at the vegetal pole due to the lesser amount of yolk. As the embryo develops, cells in the animal pole will eventually give rise to the ectoderm, which forms the outer layer of the skin, the nervous system, and other structures. This differentiation is vital for the proper formation of the organism.Moreover, the positioning of the animal pole is not arbitrary; it is influenced by various factors, including the orientation of the egg during fertilization and the distribution of maternal determinants. These determinants are substances that influence the development of the embryo and help establish the body plan. For instance, in many species, the animal pole is positioned opposite the point of sperm entry, ensuring that the resulting embryo has a well-defined structure from the very beginning.Understanding the animal pole is essential for researchers studying developmental biology, as it provides insights into how organisms grow and develop from a single fertilized egg. By examining how cells at the animal pole behave and differentiate, scientists can uncover the underlying mechanisms that govern development. This knowledge not only enhances our understanding of normal biological processes but also has implications for medical research, particularly in regenerative medicine and developmental disorders.In conclusion, the animal pole (动物极) is a fundamental concept in embryology that highlights the importance of cellular organization and differentiation in the early stages of life. By recognizing the significance of the animal pole, we gain a deeper appreciation for the complexity of biological development and the intricate processes that lead to the formation of diverse life forms. As research continues to evolve, the study of the animal pole will undoubtedly remain a key focus in the quest to understand the mysteries of life itself.

在生物学的迷人世界中，动物极（animal pole）这一概念在理解胚胎发育早期阶段时发挥着至关重要的作用。动物极指的是卵细胞的两个不同区域之一，另一个是植物极。这些区域是根据蛋黄的分布和随后在胚胎中发生的发育过程来定义的。动物极通常以较低的蛋黄浓度为特征，这使得细胞分裂和分化更加活跃。这一点尤为重要，因为它为正在发育的生物体的各种组织和器官的形成奠定了基础。在受精过程中，精子细胞与卵细胞在动物极相结合，启动了一系列称为裂变的快速细胞分裂过程。在这个过程中，动物极处的细胞比植物极处的细胞分裂得更频繁，因为前者的蛋黄较少。随着胚胎的发展，动物极中的细胞最终将形成外胚层，这一层构成皮肤的外层、神经系统和其他结构。这种分化对生物体的正常形成至关重要。此外，动物极的位置并非任意；它受到多种因素的影响，包括受精时卵子的方向和母体决定因子的分布。这些决定因子是影响胚胎发育的物质，有助于建立身体结构。例如，在许多物种中，动物极位于精子进入点的相对位置，从而确保所产生的胚胎从一开始就具有明确的结构。理解动物极对于研究发育生物学的研究人员至关重要，因为它提供了关于生物体如何从单个受精卵生长和发展的见解。通过考察动物极处细胞的行为和分化，科学家们可以揭示支配发育的基本机制。这一知识不仅增强了我们对正常生物过程的理解，还有助于医学研究，特别是在再生医学和发育障碍方面。总之，动物极（animal pole）是胚胎学中的一个基本概念，突出了细胞组织和分化在生命早期阶段的重要性。通过认识到动物极的重要性，我们对生物发育的复杂性以及导致多样生命形式形成的复杂过程有了更深刻的理解。随着研究的不断发展，动物极的研究无疑将继续成为我们理解生命奥秘的关键焦点。