chelicerae

简明释义

英[kəˈlɪsəˌri]美[kəˈlɪsəˌri]

n. 铗角；螫角（chelicera 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Venom is produced by holocrine glands in the spider's chelicerae (mouth parts).

毒液是由蜘蛛螯（嘴部）的全分泌腺产生的。

2.Venom is produced by holocrine glands in the spider's chelicerae (mouth parts).

毒液是由蜘蛛螯（嘴部）的全分泌腺产生的。

3.The chelicerae of horseshoe crabs are adapted for scavenging rather than predation.

马蹄蟹的螯肢适应于清道夫而不是捕食。

4.The anatomy of arachnids includes specialized chelicerae that help them consume liquid diets.

蛛形纲动物的解剖结构包括专门的螯肢，帮助它们消耗液态饮食。

5.Some species of spiders have venomous chelicerae that can paralyze their prey.

一些蜘蛛种类有毒的螯肢可以麻痹它们的猎物。

6.In scorpions, the chelicerae are smaller than the pincers but still play a crucial role in feeding.

在蝎子中，螯肢比钳子小，但在进食中仍然发挥着重要作用。

7.The spider uses its chelicerae to grasp and immobilize its prey.

蜘蛛用它的螯肢抓住并 immobilize 它的猎物。

作文

The term chelicerae refers to a pair of mouthparts found in arachnids, which include spiders, scorpions, and ticks. These specialized appendages are crucial for the feeding behavior of these creatures. Unlike insects, which possess mandibles, arachnids have evolved chelicerae to serve various functions, including grasping, crushing, and injecting venom into their prey. This adaptation allows them to thrive in diverse environments and exploit different food sources.The structure of chelicerae varies significantly among different arachnid species. In spiders, for instance, the chelicerae are often equipped with fangs that can deliver venom, immobilizing their prey before consumption. The venom itself is a complex mixture of enzymes and toxins that aid in digestion by breaking down the tissues of the prey. This process is vital as it allows spiders to consume larger prey items than they could physically manage otherwise.Scorpions, on the other hand, have more robust chelicerae, which they use to crush their prey. Their diet primarily consists of insects and other small animals, and the strength of their chelicerae enables them to effectively subdue their catch. Additionally, scorpions possess a stinger that delivers venom, providing an extra layer of defense and a means to capture prey.Ticks, although less commonly discussed, also possess chelicerae. In ticks, these mouthparts are adapted for piercing the skin of their hosts, allowing them to feed on blood. The chelicerae of ticks are often serrated, enabling them to anchor themselves securely while feeding. This adaptation is crucial for their survival, as it allows them to remain attached to their hosts for extended periods.The evolution of chelicerae showcases the incredible diversity within the arachnid class. These mouthparts have adapted to meet the specific dietary needs and ecological niches of different species. For example, some spiders have developed chelicerae that can produce silk, allowing them to create webs for trapping prey. This innovation has enabled spiders to become one of the most successful groups of predators in the animal kingdom.In addition to their role in feeding, chelicerae can also play a part in mating rituals and territorial disputes. Some male spiders use their chelicerae to display strength or to engage in combat with rival males. This behavior highlights the importance of these structures beyond mere sustenance, as they also contribute to reproductive success.Understanding the function and significance of chelicerae provides insight into the evolutionary adaptations of arachnids. These mouthparts are not only essential for feeding but also play a critical role in the survival and reproduction of these fascinating creatures. As we continue to study arachnids and their unique adaptations, we gain a deeper appreciation for the complexity of life forms on our planet and the intricate relationships they maintain within their ecosystems.In conclusion, chelicerae are a remarkable example of evolutionary innovation in the animal kingdom. Their diverse forms and functions highlight the adaptability of arachnids and their ability to thrive in various ecological niches. By studying chelicerae and their roles in the lives of arachnids, we can better understand the intricate web of life that exists around us.

术语chelicerae指的是在蛛形纲动物中发现的一对口器，这些动物包括蜘蛛、蝎子和蜱虫。这些特殊的附肢对于这些生物的进食行为至关重要。与昆虫拥有的颚不同，蛛形纲动物已经进化出chelicerae以执行各种功能，包括抓取、压碎和向猎物注射毒液。这种适应使它们能够在多样的环境中生存并利用不同的食物来源。chelicerae的结构在不同的蛛形纲物种之间差异显著。例如，在蜘蛛中，chelicerae通常配备有可以注射毒液的毒牙，能够在摄食之前使猎物失去行动能力。毒液本身是复杂的酶和毒素的混合物，有助于消化，通过分解猎物的组织来促进消化。这个过程至关重要，因为它使蜘蛛能够消耗比它们物理上能够处理的更大的猎物。另一方面，蝎子的chelicerae则更加坚固，它们用来压碎猎物。它们的饮食主要由昆虫和其他小动物组成，而chelicerae的力量使它们能够有效地制服捕获的猎物。此外，蝎子还拥有一个能注射毒液的尾刺，提供额外的防御层和捕捉猎物的手段。蜱虫虽然不常被讨论，但也具备chelicerae。在蜱虫中，这些口器适应于穿透宿主的皮肤，使它们能够吸血。蜱虫的chelicerae通常是锯齿状的，使它们在进食时能够牢牢附着。这种适应对于它们的生存至关重要，因为它使它们能够在宿主身上停留较长时间。chelicerae的进化展示了蛛形纲动物类群的惊人多样性。这些口器已经适应了不同物种特定的饮食需求和生态位。例如，一些蜘蛛发展出能够产生丝的chelicerae，使它们能够编织网以捕捉猎物。这一创新使得蜘蛛成为动物王国中最成功的捕食者之一。除了在进食中的作用外，chelicerae还可以在交配仪式和领土争斗中发挥作用。一些雄性蜘蛛使用它们的chelicerae来展示力量或与竞争对手进行搏斗。这种行为突显了这些结构在生存之外的重要性，因为它们也有助于繁殖成功。理解chelicerae的功能和重要性为我们提供了蛛形纲动物进化适应的洞察。这些口器不仅对进食至关重要，而且在这些迷人生物的生存和繁殖中也发挥着关键作用。随着我们继续研究蛛形纲动物及其独特的适应性，我们对我们星球上生命形式的复杂性以及它们在生态系统中维持的错综关系有了更深的理解。总之，chelicerae是动物王国中进化创新的一个显著例子。它们多样的形式和功能突显了蛛形纲动物的适应性及其在各种生态位中生存的能力。通过研究chelicerae及其在蛛形纲动物生活中的作用，我们可以更好地理解存在于我们周围的复杂生命网络。