nematocyst

简明释义

英[ˈnemətəˌsɪst]美[ˈnemətoʊˌsɪst]

n. 刺细胞，[无脊椎] 刺丝囊

英英释义

单词用法

同义词

反义词

例句

1.Nematocyst warts on the small tentacles become stick from conical and the shape of gonads changes triangular pocket-like from grain-like to small vesica.

小触手刺丝囊疣从乳突状变为棒状；生殖腺形状从米粒状变为小囊状、三角囊袋状。

2.Nematocyst warts on the small tentacles become stick from conical and the shape of gonads changes triangular pocket-like from grain-like to small vesica.

小触手刺丝囊疣从乳突状变为棒状；生殖腺形状从米粒状变为小囊状、三角囊袋状。

3.The jellyfish uses its nematocyst (刺细胞) to capture prey.

水母利用它的nematocyst (刺细胞) 来捕捉猎物。

4.When touched, the nematocyst (刺细胞) can inject venom into the skin.

当被触碰时，nematocyst (刺细胞) 可以将毒液注入皮肤。

5.Scientists study the structure of the nematocyst (刺细胞) to understand its function.

科学家研究nematocyst (刺细胞) 的结构以理解其功能。

6.Certain species of coral have nematocysts (刺细胞) that help them defend against predators.

某些珊瑚种类拥有nematocysts (刺细胞)，帮助它们抵御捕食者。

7.In marine biology, the nematocyst (刺细胞) is a key feature of cnidarians.

在海洋生物学中，nematocyst (刺细胞) 是腔肠动物的一个关键特征。

作文

The ocean is a vast and mysterious place, home to countless species that exhibit fascinating adaptations for survival. Among these creatures are jellyfish, which are often seen floating gracefully in the water. One of the most intriguing features of jellyfish is their ability to defend themselves using specialized cells known as nematocysts. These tiny, harpoon-like structures are essential for the jellyfish's survival, allowing them to capture prey and deter predators. A nematocyst is a specialized cell found in the tentacles of cnidarians, which include jellyfish, sea anemones, and corals. When triggered by physical contact or chemical signals, the nematocyst ejects a coiled thread that can penetrate the skin of potential threats or prey. This thread often contains toxins that can cause pain or paralysis, making it an effective weapon for the jellyfish. The mechanism of the nematocyst is a marvel of nature; the rapid discharge of the thread occurs in less than a millisecond, showcasing an incredible evolutionary adaptation. The role of nematocysts extends beyond mere defense. For jellyfish, they are also a vital tool for capturing food. When a jellyfish senses the presence of small fish or plankton, its tentacles, armed with nematocysts, reach out to ensnare the prey. Once the prey is immobilized, the jellyfish brings it to its mouth, where it can be consumed. This predatory behavior highlights the importance of nematocysts in the jellyfish's feeding strategy, demonstrating how these cells are crucial for their survival in the competitive marine environment. Interestingly, not all nematocysts are created equal. Different species of jellyfish possess various types of nematocysts, each adapted for specific functions. Some nematocysts are designed for stunning prey, while others may be more effective at deterring larger predators. This diversity allows jellyfish to thrive in a range of habitats, from shallow coastal waters to the deep sea. The study of nematocysts has implications beyond understanding jellyfish biology. Researchers are exploring the potential applications of the toxins found within nematocysts. Some of these compounds have shown promise in medical research, particularly in pain management and cancer treatment. By studying how nematocysts function, scientists hope to unlock new therapeutic avenues that could benefit human health. In conclusion, nematocysts are remarkable structures that play a vital role in the lives of jellyfish and other cnidarians. Their ability to capture prey and defend against threats showcases the intricate adaptations that marine organisms have developed over millions of years. As we continue to explore the mysteries of the ocean, understanding the function and significance of nematocysts will undoubtedly enhance our appreciation of the delicate balance of marine ecosystems and the wonders of evolution. In summary, the word nematocyst refers to a specialized cell in jellyfish that plays a crucial role in their survival by enabling them to capture prey and defend against predators. This fascinating adaptation illustrates the complexity of life in the ocean and opens up exciting possibilities for scientific research.

海洋是一个广阔而神秘的地方，栖息着无数种展现出迷人适应能力的生物。在这些生物中，水母常常优雅地漂浮在水中。水母最引人注目的特征之一是它们能够利用称为刺细胞的特殊细胞来保护自己。这些微小的、像鱼叉一样的结构对水母的生存至关重要，使它们能够捕捉猎物并威慑捕食者。刺细胞是一种在腔肠动物（包括水母、海葵和珊瑚）触手中发现的特殊细胞。当受到物理接触或化学信号触发时，刺细胞会释放出一根卷曲的丝线，可以穿透潜在威胁或猎物的皮肤。这根丝线通常含有毒素，能够造成疼痛或麻痹，从而成为水母有效的武器。刺细胞的机制是自然的奇迹；丝线的快速释放发生在不到一毫秒的时间内，展示了惊人的进化适应性。刺细胞的作用不仅仅是防御。对于水母来说，它们也是捕捉食物的重要工具。当水母感知到小鱼或浮游生物的存在时，其触手上装备的刺细胞会伸出以捕捉猎物。一旦猎物被麻痹，水母就会将其带到嘴边进行吞食。这种捕食行为突显了刺细胞在水母觅食策略中的重要性，展示了这些细胞在竞争激烈的海洋环境中对其生存的关键作用。有趣的是，并非所有的刺细胞都是相同的。不同种类的水母拥有各种类型的刺细胞，每种都适应于特定的功能。有些刺细胞旨在震撼猎物，而另一些则可能更有效地阻止较大的捕食者。这种多样性使水母能够在从浅海到深海的多种栖息地中繁衍生息。对刺细胞的研究超越了对水母生物学的理解。研究人员正在探索刺细胞中发现的毒素的潜在应用。其中一些化合物在医学研究中显示出前景，特别是在疼痛管理和癌症治疗方面。通过研究刺细胞的功能，科学家希望揭开新的治疗途径，这些途径可能会造福人类健康。总之，刺细胞是杰出的结构，在水母和其他腔肠动物的生活中起着至关重要的作用。它们捕捉猎物和防御威胁的能力展示了海洋生物经过数百万年发展而形成的复杂适应性。随着我们继续探索海洋的奥秘，理解刺细胞的功能和重要性无疑会增强我们对海洋生态系统微妙平衡和进化奇观的欣赏。总之，刺细胞这个词指的是水母中一种特殊的细胞，它通过使水母能够捕捉猎物和抵御捕食者而在其生存中发挥关键作用。这种迷人的适应性说明了海洋生命的复杂性，并为科学研究开辟了令人兴奋的可能性。