miracidium

简明释义

英[ˌmɪrəˈsɪdiəm]美[ˌmɪrəˈsɪdiəm]

n. [无脊椎]纤毛幼虫；毛蚴（等于 miracidia）

复 数 m i r a c i d i a

英英释义

单词用法

同义词

反义词

例句

1.Researchers observed the behavior of the miracidium 幼虫 in various water conditions.

研究人员观察了在不同水条件下的miracidium 幼虫行为。

2.The miracidium 幼虫 is equipped with cilia that help it swim in freshwater environments.

为了在淡水环境中游动，miracidium 幼虫配备了纤毛。

3.Once inside the snail, the miracidium 幼虫 transforms into a sporocyst.

一旦进入蜗牛体内，miracidium 幼虫会转变为囊蚴。

4.The life cycle of the trematode begins with the release of the miracidium 幼虫 into the water.

吸虫的生命周期始于将miracidium 幼虫释放到水中。

5.After hatching, the miracidium 幼虫 must find a suitable snail host to continue its development.

孵化后，miracidium 幼虫必须找到合适的蜗牛宿主以继续其发育。

作文

The lifecycle of many parasites is fascinating and complex, particularly when we consider organisms like flukes. One of the most intriguing stages in the lifecycle of these flatworms is the initial larval form known as miracidium. This term refers to a free-swimming larval stage that emerges from the eggs laid by adult flukes, specifically those belonging to the class Trematoda. Understanding the characteristics and significance of the miracidium is essential for studying parasitology and the ecological implications of these organisms.The miracidium is typically ciliated, allowing it to swim through water in search of a suitable host, usually a snail. This stage is crucial for the survival of the fluke, as it must find a host to continue its development. Once the miracidium locates a snail, it penetrates the host’s tissues, transforming into a different larval stage called a sporocyst. This transition marks a significant change in the organism's life cycle, as it begins to reproduce asexually within the host.The ability of the miracidium to locate and infect a host is a remarkable example of evolutionary adaptation. It has developed specialized structures and mechanisms that enhance its chances of survival. For instance, the cilia on its surface not only aid in swimming but also help in sensing the environment. Furthermore, the miracidium can detect chemical cues released by potential hosts, guiding it towards the right direction. This intricate process reflects the delicate balance of ecosystems and the roles various organisms play within them.From a broader perspective, the study of the miracidium and its lifecycle can provide insights into the dynamics of host-parasite interactions. For instance, understanding how the miracidium successfully invades a host can inform strategies for controlling fluke populations, which are responsible for diseases such as schistosomiasis in humans. Schistosomiasis is a significant public health concern in many parts of the world, affecting millions of people. By targeting the miracidium stage, researchers can develop interventions that disrupt the lifecycle of the parasite, ultimately reducing infection rates.In addition to its medical significance, the miracidium serves as an excellent example of biological diversity and the complexity of life cycles in nature. It highlights how organisms have evolved unique strategies for reproduction and survival in various environments. The transformation from a free-swimming miracidium to a more complex larval form illustrates the adaptability of life forms to their surroundings, showcasing the wonders of evolution.In conclusion, the miracidium is not just a simple larval stage; it represents a critical phase in the lifecycle of flukes that has significant implications for both ecology and human health. By studying this fascinating organism, we can gain a deeper understanding of parasitic relationships and their impact on ecosystems. The miracidium exemplifies the intricate connections in nature and the importance of each stage in the life cycle of living organisms. As we continue to explore the complexities of life, the miracidium serves as a reminder of the diverse strategies that life employs to thrive in an ever-changing world.

许多寄生虫的生命周期是迷人而复杂的，特别是当我们考虑像吸虫这样的生物时。在这些扁形动物的生命周期中，一个最引人入胜的阶段是称为miracidium的初始幼虫形式。这个术语指的是一种自由游动的幼虫阶段，它从成虫吸虫所产的卵中孵化出来，特别是属于扁形动物门的那些。理解miracidium的特征和重要性对于研究寄生虫学及其生态影响至关重要。miracidium通常具有纤毛，使其能够在水中游动，寻找合适的宿主，通常是一种蜗牛。这个阶段对吸虫的生存至关重要，因为它必须找到宿主以继续发育。一旦miracidium定位到蜗牛，它就会穿透宿主的组织，转变为一种称为孢囊的不同幼虫阶段。这一转变标志着有机体生命周期中的重要变化，因为它开始在宿主体内无性繁殖。miracidium能够定位和感染宿主的能力是进化适应性的一个显著例子。它发展出了特殊的结构和机制，以增强其生存的机会。例如，其表面的纤毛不仅有助于游泳，还帮助感知环境。此外，miracidium可以检测潜在宿主释放的化学信号，引导其朝正确的方向前进。这一复杂的过程反映了生态系统的微妙平衡以及各种生物在其中扮演的角色。从更广泛的角度来看，研究miracidium及其生命周期可以提供有关宿主-寄生虫相互作用动态的见解。例如，了解miracidium如何成功侵入宿主可以为控制吸虫种群提供策略，这些吸虫是导致人类如血吸虫病等疾病的元凶。血吸虫病在世界许多地区都是一个重大的公共卫生问题，影响着数百万人。通过针对miracidium阶段，研究人员可以开发干预措施，破坏寄生虫的生命周期，最终降低感染率。除了医学意义外，miracidium还作为生物多样性和自然界生命周期复杂性的绝佳示例。它突显了生物为适应各种环境而进化出独特的繁殖和生存策略。从自由游动的miracidium转变为更复杂的幼虫形式，展示了生命形式如何适应其周围环境，展示了进化的奇迹。总之，miracidium不仅仅是一个简单的幼虫阶段；它代表了吸虫生命周期中的关键阶段，对生态和人类健康都有重要影响。通过研究这一迷人的生物，我们可以更深入地理解寄生关系及其对生态系统的影响。miracidium体现了自然界中的复杂联系以及每个阶段在生物生命周期中的重要性。当我们继续探索生命的复杂性时，miracidium提醒我们生命在不断变化的世界中生存所采用的多样化策略。