clitellum

简明释义

英[klɪˈteləm]美[klaɪˈteləm]

n. [无脊椎] 环带；生殖带

复 数 c l i t e l l a

英英释义

单词用法

同义词

反义词

例句

1.The position of the clitellum is used as a diagnostic character.

生殖带的位置用来作为一个鉴别的特征。

2.Lumbricidae have the clitellum on the anterior part of the body.

正蚓科的生殖带位于身体的前部。

3.The clitellum is the glandular portion of the epidermis .

生殖带是表皮的腺体部分。

4.The position of the clitellum is used as a diagnostic character .

生殖带的位置用来作为一个鉴别的特征。

5.Lumbricidae have the clitellum on the anterior part of the body.

正蚓科的生殖带位于身体的前部。

6.The clitellum is the glandular portion of the epidermis.

生殖带是表皮的腺体部分。

7.You can easily identify the clitellum on an earthworm by its thicker, lighter band.

你可以通过更厚、更浅的带子轻松识别蚯蚓上的环带。

8.The earthworm's clitellum plays a crucial role in reproduction.

蚯蚓的环带在繁殖中起着至关重要的作用。

9.The presence of a well-defined clitellum indicates that the worm is mature.

明显的环带表明这条蚯蚓已经成熟。

10.During mating, the two earthworms align their clitellum to exchange sperm.

在交配过程中，两条蚯蚓对齐它们的环带以交换精子。

11.The clitellum secretes a mucus that helps form the cocoon for the eggs.

该环带分泌的粘液有助于形成卵囊。

作文

The earthworm is a fascinating creature that plays a crucial role in our ecosystem. One of the most interesting features of the earthworm is its reproductive system. The part of the earthworm responsible for reproduction is known as the clitellum, which is a thickened, glandular section of the body. This structure is typically found in mature earthworms and serves several important functions during the mating process. When two earthworms mate, they align their bodies ventrally and exchange sperm. The clitellum secretes a mucus ring that helps to hold the two worms together during this process. This mucus also forms a cocoon for the fertilized eggs after mating has occurred. The presence of the clitellum is essential for the successful reproduction of earthworms, as it provides both protection and nourishment for the developing embryos.The clitellum is not only important for reproduction but also indicates the maturity of an earthworm. Young earthworms do not have a fully developed clitellum, and it typically appears when the worm reaches sexual maturity. This makes the clitellum a useful feature for identifying the age and reproductive status of earthworms in the wild.Furthermore, the clitellum plays a role in the overall health of the earthworm. It secretes various substances that help to maintain moisture levels in the soil, which is vital for the earthworm's survival. In addition, the mucus produced by the clitellum can help to protect the earthworm from parasites and other harmful microorganisms in the soil.In conclusion, the clitellum is a remarkable adaptation that highlights the complexity of earthworm biology. Its role in reproduction, maturity, and health underscores the importance of this simple yet essential organism in our ecosystem. Understanding the function of the clitellum not only enhances our knowledge of earthworms but also emphasizes their significance in maintaining soil health and fertility. As we continue to learn more about these creatures, we can appreciate the intricate relationships they have with their environment and the vital contributions they make to our planet's ecosystem.

蚯蚓是一种迷人的生物，在我们的生态系统中发挥着至关重要的作用。蚯蚓最有趣的特征之一是它的生殖系统。负责生殖的部分被称为clitellum，这是身体的一部分，厚实且腺体分泌。这个结构通常出现在成熟的蚯蚓身上，并在交配过程中发挥几个重要功能。当两只蚯蚓交配时，它们会腹部对齐并交换精子。clitellum分泌粘液环，有助于在此过程中将两只蚯蚓保持在一起。这种粘液还为交配后受精卵提供了一个保护的卵囊。clitellum的存在对于蚯蚓的成功繁殖至关重要，因为它为发育中的胚胎提供了保护和营养。clitellum不仅对生殖重要，还指示了蚯蚓的成熟度。幼年蚯蚓没有完全发育的clitellum，通常在蚯蚓达到性成熟时才会出现。这使得clitellum成为识别野外蚯蚓年龄和生殖状态的有用特征。此外，clitellum在蚯蚓的整体健康中也发挥着作用。它分泌各种物质，帮助维持土壤中的水分水平，这对蚯蚓的生存至关重要。此外，clitellum产生的粘液可以帮助保护蚯蚓免受土壤中寄生虫和其他有害微生物的侵害。总之，clitellum是一种显著的适应性特征，突显了蚯蚓生物学的复杂性。它在生殖、成熟和健康方面的作用强调了这种简单而又重要的生物在我们生态系统中的重要性。理解clitellum的功能不仅增强了我们对蚯蚓的认识，还强调了它们在维持土壤健康和肥力方面的重大贡献。随着我们对这些生物的进一步了解，我们可以欣赏它们与环境之间的复杂关系，以及它们对地球生态系统的重要贡献。