tunicates

简明释义

英[ˈtjuːnɪkeɪts]美[ˈtjunɪˌkeɪts]

n. 被囊类；被囊动物（tunicate 的复数形式）

英英释义

单词用法

同义词

反义词

例句

1.Purple tunicates filter the water for food.

紫色的被囊动物从海水中过滤出食物。

2.Purple tunicates filter the water for food.

紫色的被囊动物从海水中过滤出食物。

3.Invertebrates like tunicates (海鞘) play a crucial role in marine ecosystems.

像海鞘这样的无脊椎动物在海洋生态系统中起着至关重要的作用。

4.Some tunicates (海鞘) can filter water, improving the quality of their environment.

一些海鞘可以过滤水，改善它们环境的质量。

5.Scientists discovered new species of tunicates (海鞘) during their expedition.

科学家们在探险中发现了新的海鞘物种。

6.The marine biologist studied the behavior of tunicates (海鞘) in their natural habitat.

这位海洋生物学家研究了海鞘在其自然栖息地中的行为。

7.The research focused on the feeding mechanisms of tunicates (海鞘).

研究集中在海鞘的进食机制上。

作文

Tunicates, also known as sea squirts, are fascinating marine animals that belong to the phylum Chordata. They are unique in that they exhibit both vertebrate and invertebrate characteristics throughout their life cycle. Adult tunicates (海鞘) are mostly sessile, meaning they attach themselves to surfaces like rocks or coral, while their larval forms are free-swimming and resemble tadpoles. This duality makes tunicates (海鞘) particularly interesting for scientists studying evolutionary biology. One of the most remarkable features of tunicates (海鞘) is their ability to filter feed. They draw in water through an incurrent siphon, filter out microscopic plankton, and then expel the excess water through an excurrent siphon. This feeding mechanism plays a crucial role in maintaining the health of marine ecosystems, as tunicates (海鞘) help to clean the water by removing excess nutrients and organic matter. There are three main classes of tunicates (海鞘): Ascidiacea, Thaliacea, and Appendicularia. Ascidians are the most common and are often found in shallow waters. They can be solitary or colonial, forming large groups that create vibrant underwater landscapes. Thaliaceans, on the other hand, are free-floating and often found in open ocean environments. Appendicularians are small, pelagic tunicates that maintain a larval form throughout their lives, which allows them to swim freely in the water column. Each class of tunicates (海鞘) has adapted to its environment in unique ways, showcasing the diversity within this group. Research has shown that tunicates (海鞘) have a complex immune system, which is quite advanced for invertebrates. They possess a variety of immune cells and molecules that help them defend against pathogens. This has sparked interest in the scientific community, as understanding the immune responses of tunicates (海鞘) may provide insights into the evolution of immune systems in higher vertebrates, including humans. Moreover, tunicates (海鞘) are also of interest in biotechnology and medicine. Some species produce bioactive compounds that have potential applications in pharmaceuticals. For instance, certain tunicates (海鞘) are known to produce substances that can inhibit cancer cell growth or have antimicrobial properties. This has led to ongoing research aimed at discovering new drugs derived from these unique organisms. In conclusion, tunicates (海鞘) are not just simple marine creatures; they are complex organisms that play significant roles in their ecosystems and offer valuable insights into biological research. Their unique characteristics, such as their dual life stages, filtering capabilities, and advanced immune systems, make them a subject of great interest for scientists. As we continue to explore the oceans and understand the myriad of life forms within, tunicates (海鞘) will undoubtedly remain a key focus for future studies and discoveries. Their ecological importance and potential medicinal benefits highlight the need for continued research and conservation efforts to protect these incredible animals and their habitats.

海鞘，亦称为海洋喷射器，是属于脊索动物门的迷人海洋动物。它们的独特之处在于，在生命周期的不同阶段表现出脊椎动物和无脊椎动物的特征。成年海鞘（tunicates）大多是固定的，意味着它们附着在岩石或珊瑚等表面，而它们的幼虫形态则是自由游动的，类似蝌蚪。这种二元性使得海鞘（tunicates）对研究进化生物学的科学家特别有趣。海鞘（tunicates）最显著的特点之一是它们的过滤喂养能力。它们通过一个入流管吸入水，过滤出微小的浮游生物，然后通过一个排流管排出多余的水。这种喂养机制在维持海洋生态系统的健康中发挥着至关重要的作用，因为海鞘（tunicates）通过去除过量的营养物质和有机物来帮助清洁水域。海鞘（tunicates）主要分为三类：海鞘纲（Ascidiacea）、浮游海鞘纲（Thaliacea）和附肢海鞘纲（Appendicularia）。海鞘类是最常见的，通常在浅水区发现。它们可以是单独的也可以是群体的，形成大型群落，创造出色彩斑斓的水下景观。而浮游海鞘则是自由漂浮的，通常在开阔海洋环境中发现。附肢海鞘是小型的、浮游的海鞘，它们在一生中保持幼虫形态，这使它们能够在水柱中自由游动。每个类别的海鞘（tunicates）都以独特的方式适应其环境，展示了这一群体内部的多样性。研究表明，海鞘（tunicates）拥有复杂的免疫系统，这对于无脊椎动物来说相当先进。它们具有多种免疫细胞和分子，有助于抵御病原体。这引起了科学界的兴趣，因为理解海鞘（tunicates）的免疫反应可能会为我们了解更高脊椎动物（包括人类）的免疫系统演变提供线索。此外，海鞘（tunicates）在生物技术和医学领域也备受关注。一些物种产生的生物活性化合物在制药方面具有潜在应用。例如，某些海鞘（tunicates）已知能产生抑制癌细胞生长或具有抗菌特性的物质。这导致了对这些独特生物体的新药开发的持续研究。总之，海鞘（tunicates）不仅仅是简单的海洋生物；它们是复杂的生物体，在生态系统中发挥着重要作用，并为生物学研究提供了宝贵的见解。它们独特的特征，如双重生活阶段、过滤能力和先进的免疫系统，使它们成为科学家的重要研究对象。随着我们继续探索海洋，理解其中无数生命形式，海鞘（tunicates）无疑将继续是未来研究和发现的重点。它们的生态重要性和潜在的药用益处突显了继续研究和保护这些令人难以置信的动物及其栖息地的必要性。