nephridia

简明释义

英[nɪˈfrɪdiə]美[nɪfˈrɪdɪə]

原肾

肾管

英英释义

单词用法

同义词

反义词

例句

1.In the earthworm and many other invertebrates, these excretory structures are called nephridia.

在蚯蚓和许多其它无脊椎动物中，这些排泄结构称为肾管。

2.In the earthworm and many other invertebrates, these excretory structures are called nephridia.

在蚯蚓和许多其它无脊椎动物中，这些排泄结构称为肾管。

3.The excretory system in earthworms includes structures called nephridia, which help in removing waste from their bodies.

蚯蚓的排泄系统包括被称为nephridia的结构，帮助去除体内的废物。

4.The efficiency of nephridia in flatworms is crucial for their survival in aquatic habitats.

扁形动物中nephridia的效率对它们在水生栖息地的生存至关重要。

5.Research shows that nephridia can adapt to different environmental conditions to optimize waste removal.

研究表明，nephridia可以适应不同的环境条件，以优化废物去除。

6.The presence of nephridia in annelids indicates a complex excretory system.

环节动物中存在nephridia表明其具有复杂的排泄系统。

7.In mollusks, nephridia function similarly to kidneys by filtering waste from the blood.

在软体动物中，nephridia的功能类似于肾脏，通过过滤血液中的废物。

作文

The study of biology encompasses a wide range of topics, one of which is the excretory systems of various organisms. Among these systems, the term nephridia refers to specialized excretory structures found in certain invertebrates, particularly annelids such as earthworms. Understanding nephridia is crucial for comprehending how these organisms manage waste and maintain homeostasis. In essence, nephridia are tubular structures that function similarly to kidneys in vertebrates. They play a vital role in filtering waste products from the blood and excreting them outside the body. Each segment of an annelid worm contains a pair of nephridia, which are lined with ciliated cells that help in the movement of fluids. The process begins when blood enters the nephridia, where waste materials are filtered out. This filtration process is essential for maintaining the internal balance of salts and water, ensuring that the organism does not become dehydrated or overloaded with toxins. The structure of nephridia is fascinating. They typically consist of a nephrostome, a coiled tubule, and a nephridiopore. The nephrostome is the opening through which the coelomic fluid enters the nephridia. As the fluid passes through the tubule, valuable substances such as nutrients and ions are reabsorbed back into the bloodstream, while waste products remain to be expelled. Finally, the waste is excreted through the nephridiopore, which opens to the exterior of the body. This efficient system allows annelids to thrive in diverse environments, from moist soil to aquatic habitats.Interestingly, the concept of nephridia extends beyond just annelids. Other organisms, such as mollusks and some arthropods, possess similar structures that serve comparable functions. For instance, the green glands of crayfish are analogous to nephridia, demonstrating the evolutionary significance of these excretory organs. This similarity across different species highlights the importance of excretion in the animal kingdom and the various adaptations that have evolved to address this fundamental biological need.Moreover, studying nephridia provides insights into evolutionary biology. The presence of nephridia in various taxa suggests a common ancestral trait, showcasing how different lineages have adapted their excretory mechanisms over time. These adaptations can inform scientists about the ecological niches these organisms occupy and how they interact with their environments. In conclusion, nephridia are remarkable structures that illustrate the complexity of biological systems in invertebrates. By understanding their function and structure, we gain a deeper appreciation for the diversity of life and the intricate processes that sustain it. Whether in the soil beneath our feet or in the depths of the ocean, nephridia play a crucial role in the survival of many organisms, highlighting the interconnectedness of life on Earth. As we continue to explore the wonders of biology, the study of nephridia serves as a reminder of the elegance and efficiency of nature's designs.

生物学的研究涵盖了广泛的主题，其中之一是各种生物的排泄系统。在这些系统中，术语nephridia指的是某些无脊椎动物中发现的专门排泄结构，特别是环节动物如蚯蚓。理解nephridia对于理解这些生物如何管理废物和维持体内平衡至关重要。本质上，nephridia是类似于脊椎动物肾脏的管状结构。它们在过滤血液中的废物并将其排出体外方面发挥着重要作用。每个环节动物的每个段落包含一对nephridia，这些结构的内壁有纤毛细胞，有助于液体的运动。这个过程开始于血液进入nephridia，在这里废物被过滤掉。这个过滤过程对于维持盐和水的内部平衡至关重要，确保生物不会脱水或毒素过载。nephridia的结构令人着迷。它们通常由肾口、卷曲的管道和肾孔组成。肾口是体腔液体进入nephridia的开口。当液体通过管道时，营养物质和离子等有价值的物质会被重新吸收到血液中，而废物则留在体外排出。最后，废物通过肾孔排出，这个孔打开到身体外部。这个高效的系统使得环节动物能够在多样的环境中生存，从潮湿的土壤到水生栖息地。有趣的是，nephridia的概念不仅限于环节动物。其他生物，如软体动物和一些节肢动物，也具有类似的结构，发挥相似的功能。例如，螃蟹的绿腺与nephridia类似，展示了这些排泄器官的进化重要性。这种不同物种之间的相似性突显了排泄在动物王国中的重要性，以及为满足这一基本生物需求而进化出的各种适应性。此外，研究nephridia提供了对进化生物学的见解。不同类群中存在的nephridia表明了一种共同的祖先特征，展示了不同谱系如何随着时间的推移适应它们的排泄机制。这些适应可以告知科学家关于这些生物所占据的生态位以及它们如何与环境相互作用的信息。总之，nephridia是非脊椎动物生物复杂性的一个杰出例证。通过理解它们的功能和结构，我们对生命的多样性和维持生命的复杂过程有了更深刻的理解。无论是在我们脚下的土壤中，还是在海洋的深处，nephridia在许多生物的生存中发挥着至关重要的作用，突显了地球上生命的相互联系。随着我们继续探索生物学的奇迹，nephridia的研究提醒我们自然设计的优雅和高效。