gastrovascular

简明释义

英[ˌɡæstrəʊˈvæskjʊlə(r)]美[ˌɡæstroʊˈvæskjələr]

adj. 消化与循环两用的

英英释义

单词用法

同义词

反义词

例句

1.The prey is transported to the gastrovascular cavity.

猎物被运送至腔肠。

2.The prey is transported to the gastrovascular cavity.

猎物被运送至腔肠。

3.The jellyfish uses its gastrovascular 消化血管的 system to transport nutrients throughout its body.

水母利用其消化血管的系统在全身运输营养物质。

4.In flatworms, the gastrovascular 消化血管的 cavity serves both digestion and circulation.

在扁虫中，消化血管的腔体既用于消化也用于循环。

5.The gastrovascular 消化血管的 system allows cnidarians to efficiently distribute food.

这种消化血管的系统使刺胞动物能够有效分配食物。

6.Corals rely on their gastrovascular 消化血管的 system for nutrient absorption and waste removal.

珊瑚依赖其消化血管的系统进行营养吸收和废物排除。

7.The structure of the gastrovascular 消化血管的 cavity is crucial for the organism's survival.

该消化血管的腔体的结构对生物的生存至关重要。

作文

The term gastrovascular refers to a type of system that combines both digestive and circulatory functions, typically found in simpler organisms such as cnidarians and flatworms. These organisms do not possess complex organ systems like those found in mammals or birds; instead, they utilize a gastrovascular cavity to perform essential biological processes. Understanding the gastrovascular system is crucial for studying how these organisms survive and thrive in their environments. In essence, the gastrovascular cavity serves multiple purposes. It acts as a digestive compartment where food is broken down and nutrients are absorbed. This cavity is lined with cells that secrete enzymes to aid in digestion, allowing the organism to process its food effectively. Once the nutrients are absorbed, they can be distributed throughout the organism's body, as the gastrovascular cavity also plays a role in the transportation of these nutrients to various cells. One of the most fascinating aspects of the gastrovascular system is its simplicity and efficiency. For example, in jellyfish, the gastrovascular cavity is the primary site for digestion and nutrient distribution. The jellyfish captures prey using its tentacles, which bring the food into the gastrovascular cavity. Here, the food is digested, and the resulting nutrients diffuse into the surrounding cells, providing energy for the jellyfish's survival. Moreover, the gastrovascular system also helps in waste removal. Undigested materials are expelled back into the water through the same opening from which food enters. This dual-functionality of the gastrovascular cavity highlights how these organisms have evolved to maximize efficiency in their biological processes despite lacking complex systems. In contrast, more advanced organisms have developed separate systems for digestion and circulation. In mammals, for instance, food is processed in the digestive tract, and nutrients are then absorbed into the bloodstream, which transports them to cells throughout the body. This separation allows for greater complexity and specialization, enabling mammals to consume a wider variety of foods and maintain higher metabolic rates. However, the gastrovascular system exemplifies a highly effective adaptation for simpler life forms. It allows them to thrive in diverse aquatic environments, from shallow coastal waters to deep oceanic trenches. The efficiency of the gastrovascular system is a testament to the evolutionary success of these organisms, demonstrating that simplicity can be just as advantageous as complexity in the natural world. In conclusion, the gastrovascular system is an essential feature of certain simple organisms, illustrating how they manage digestion and nutrient distribution within their bodies. By understanding this system, we gain insight into the evolutionary adaptations that have allowed these creatures to survive in their ecological niches. The study of gastrovascular organisms not only enriches our knowledge of biology but also emphasizes the incredible diversity of life on Earth, showcasing the myriad ways organisms have evolved to meet their basic needs.

“gastrovascular”一词指的是一种结合消化和循环功能的系统，通常存在于一些简单的生物体中，如腔肠动物和扁虫。这些生物没有像哺乳动物或鸟类那样复杂的器官系统；相反，它们利用一个gastrovascular腔来执行基本的生物过程。理解gastrovascular系统对于研究这些生物如何在其环境中生存和繁衍至关重要。 从本质上讲，gastrovascular腔具有多重用途。它充当消化腔室，食物在这里被分解，营养物质被吸收。这个腔室内衬有分泌酶的细胞，以帮助消化，使生物能够有效地处理其食物。一旦营养物质被吸收，它们就可以通过gastrovascular腔分配到生物体的各个部分，因为这个腔室还在营养物质运输中发挥着作用。 gastrovascular系统最迷人的方面之一是它的简单性和效率。例如，在水母中，gastrovascular腔是消化和营养分配的主要场所。水母利用触手捕捉猎物，将食物带入gastrovascular腔。在这里，食物被消化，产生的营养物质扩散到周围的细胞，为水母的生存提供能量。 此外，gastrovascular系统还有助于废物排除。未消化的物质通过同一个入口被排回水中。这种gastrovascular腔的双重功能强调了这些生物如何进化以最大化其生物过程的效率，尽管它们缺乏复杂的系统。 相比之下，更高级的生物已经发展出独立的消化和循环系统。例如，在哺乳动物中，食物在消化道中被处理，营养物质随后被吸收到血液中，血液将其运输到全身的细胞。这种分离允许更大的复杂性和专业化，使哺乳动物能够消耗更广泛的食物种类并维持更高的代谢率。 然而，gastrovascular系统则展示了简单生命形式的一种高度有效的适应性。它使它们能够在各种水生环境中生存，从浅海沿岸到深海沟。gastrovascular系统的效率证明了这些生物的进化成功，表明在自然界中，简单性与复杂性一样具有优势。 总之，gastrovascular系统是某些简单生物的重要特征，说明它们如何管理体内的消化和营养分配。通过理解这一系统，我们可以深入了解这些生物如何在生态位中生存的进化适应。对gastrovascular生物的研究不仅丰富了我们对生物学的知识，也强调了地球生命的惊人多样性，展示了生物体为满足基本需求而进化的无数方式。