planaria

简明释义

英[pləˈneəriə]美[pləˈnærɪr]

n. 真涡虫；[无脊椎]涡虫（等于 Turbellaria）

英英释义

单词用法

同义词

反义词

例句

1.The tiny flatworm Planaria can be cut into as many as 32 pieces, each of which will grow into a whole new animal complete with eyes, mouth and internal organs.

涡虫类扁虫能被切成三十二片，而每一片都会长成一只全新的动物，眼睛、嘴和内脏俱全。

2.After all, the flatworm planaria does just fine with eyes that are arguably not as good.

从上可知，扁形涡虫的眼睛比理论上要好得多。

3.The tiny flatworm Planaria can be cut into as many as 32 pieces, each of which will grow into a whole new animal complete with eyes, mouth and internal organs.

涡虫类扁虫能被切成三十二片，而每一片都会长成一只全新的动物，眼睛、嘴和内脏俱全。

4.Experiments with planaria 涡虫 have shown how certain chemicals can affect regeneration.

对planaria 涡虫的实验表明某些化学物质如何影响再生。

5.The study of planaria 涡虫 has provided insights into regeneration.

对planaria 涡虫的研究提供了关于再生的见解。

6.Researchers are using planaria 涡虫 to explore the mechanisms of learning and memory.

研究人员正在利用planaria 涡虫探索学习和记忆的机制。

7.The ability of planaria 涡虫 to regenerate lost body parts fascinates scientists.

planaria 涡虫再生失去的身体部位的能力令科学家着迷。

8.In biology classes, students often observe planaria 涡虫 under a microscope.

在生物课上，学生们经常在显微镜下观察planaria 涡虫。

作文

The study of regeneration in biology has always fascinated scientists and researchers alike. One of the most intriguing organisms in this field is the flatworm known as planaria. These simple yet remarkable creatures possess an extraordinary ability to regenerate lost body parts, making them a prime subject for scientific investigation. Understanding how planaria regenerate can provide insights into the mechanisms of healing and regeneration in more complex organisms, including humans.Planaria, which belong to the phylum Platyhelminthes, are freshwater flatworms commonly found in ponds and streams. They have a flattened body shape and can vary in color from brown to black, often appearing with a distinctive pattern that helps them blend into their environment. What sets planaria apart from other organisms is their unique regenerative capabilities. If a planaria loses a part of its body, such as its tail or even its head, it can regrow these missing parts within weeks. This process involves complex cellular mechanisms that scientists are still trying to fully understand.One of the most fascinating aspects of planaria regeneration is their ability to regenerate not just limbs but entire bodies from small fragments. For instance, if a planaria is cut into several pieces, each piece can regenerate into a complete organism. This phenomenon raises important questions about the nature of identity and the biological processes that govern regeneration. How do the cells know what to become? How is the information for regeneration stored within the organism?Research on planaria has led to significant discoveries in the field of stem cell biology. The cells responsible for regeneration in planaria are known as neoblasts, which are a type of pluripotent stem cell. These cells have the potential to differentiate into any cell type, allowing the planaria to replace lost tissues and organs. Scientists are investigating the genetic and molecular pathways involved in this process, hoping to uncover the secrets of regeneration that could one day be applied to medical science.Moreover, studying planaria also provides valuable insights into the evolutionary aspects of regeneration. Many species in the animal kingdom exhibit varying degrees of regenerative abilities, but planaria are among the most efficient. By comparing the regenerative processes in planaria with those in other animals, researchers can better understand how these traits evolved and what factors influence the capacity for regeneration.In conclusion, planaria are more than just simple flatworms; they are a window into the mysteries of regeneration and healing. Their remarkable abilities challenge our understanding of biology and offer hope for advancements in regenerative medicine. As research continues, the secrets held by planaria may unlock new possibilities for treating injuries and diseases in humans, making them a crucial focus in the field of biological studies. The ongoing exploration of these fascinating creatures is sure to yield exciting discoveries that will enrich our understanding of life itself.

生物学中的再生研究一直吸引着科学家和研究人员。平面虫是一种最引人注目的生物之一。这些简单而又非凡的生物具有惊人的再生能力，能够再生失去的身体部位，使它们成为科学研究的主要对象。理解平面虫如何再生可以为我们提供有关更复杂生物（包括人类）愈合和再生机制的见解。平面虫属于扁形动物门，是一种常见的淡水扁虫，通常生长在池塘和小溪中。它们具有扁平的身体形状，颜色从棕色到黑色不等，通常呈现出独特的图案，有助于它们融入环境。平面虫与其他生物的不同之处在于它们独特的再生能力。如果一只平面虫失去了身体的一部分，比如尾巴甚至头部，它可以在几周内再生这些缺失的部分。这个过程涉及复杂的细胞机制，科学家们仍在努力全面了解。平面虫再生的一个最迷人的方面是它们不仅能再生肢体，还能从小碎片中再生整个身体。例如，如果将平面虫切成几块，每一块都可以再生成完整的生物。这一现象引发了关于身份本质和支配再生的生物过程的重要问题。细胞是如何知道该变成什么的？再生的信息是如何存储在生物体内的？对平面虫的研究已经在干细胞生物学领域取得了重要发现。负责平面虫再生的细胞被称为新生细胞，这是一种多能干细胞。这些细胞具有分化为任何细胞类型的潜力，使平面虫能够替代失去的组织和器官。科学家们正在研究这一过程中的遗传和分子通路，希望揭示再生的秘密，这些秘密未来可能会应用于医学科学。此外，研究平面虫也为我们提供了有关再生进化方面的宝贵见解。动物王国中的许多物种表现出不同程度的再生能力，但平面虫是其中效率最高的之一。通过比较平面虫与其他动物的再生过程，研究人员可以更好地理解这些特征是如何演化的，以及哪些因素影响再生能力。总之，平面虫不仅仅是简单的扁虫；它们是再生和愈合奥秘的窗口。它们非凡的能力挑战了我们对生物学的理解，并为再生医学的进步带来了希望。随着研究的持续，平面虫所蕴含的秘密可能会开启新的可能性，为人类治疗伤害和疾病铺平道路，使它们成为生物研究领域的重要关注点。这些迷人生物的持续探索必将带来激动人心的发现，丰富我们对生命本身的理解。