alveolus of lung

简明释义

肺泡

英英释义

例句

1.Inflammation can lead to fluid accumulation in the alveolus of lung (肺泡).

炎症可能导致液体在肺泡中积聚。

2.The exchange of gases occurs in the alveolus of lung (肺泡).

气体交换发生在肺泡。

3.Damage to the alveolus of lung (肺泡) can impair oxygen absorption.

对肺泡的损伤可能会影响氧气的吸收。

4.The alveolus of lung (肺泡) plays a crucial role in respiration.

肺泡在呼吸中起着至关重要的作用。

5.Each alveolus of lung (肺泡) is surrounded by a network of capillaries.

每个肺泡周围都有毛细血管网。

作文

The human respiratory system is a complex network that plays a crucial role in our ability to breathe and sustain life. At the heart of this system lies the alveolus of lung, which is essential for gas exchange. The lungs are made up of millions of tiny air sacs called alveoli (plural of alveolus), which are the sites where oxygen enters the bloodstream and carbon dioxide is expelled. Understanding the function and structure of the alveolus of lung can provide insights into how our bodies operate and the importance of maintaining healthy lungs.The alveolus of lung is a microscopic structure, approximately 0.2 to 0.5 millimeters in diameter. Each alveolus is surrounded by a network of capillaries, which are tiny blood vessels that facilitate the exchange of gases. When we inhale, air fills the alveoli, and oxygen diffuses across the thin walls of the alveolus of lung into the blood. Simultaneously, carbon dioxide, a waste product of metabolism, diffuses from the blood into the alveoli to be exhaled. This process is vital for maintaining proper oxygen levels in the body and removing carbon dioxide, which can be toxic in high concentrations.The structure of the alveolus of lung is specifically designed to maximize surface area while minimizing diffusion distance. Each lung contains about 300 million alveoli, providing an enormous surface area for gas exchange—approximately the size of a tennis court. The walls of the alveolus are composed of a single layer of epithelial cells, which allows for efficient gas diffusion. Additionally, the presence of surfactant, a substance that reduces surface tension, prevents the alveoli from collapsing and ensures they remain open for gas exchange.Several factors can affect the health and function of the alveolus of lung. Smoking, for instance, can lead to the destruction of alveoli and the development of chronic obstructive pulmonary disease (COPD). Pollution and environmental toxins can also damage the delicate structures of the alveoli, leading to respiratory issues. Maintaining good lung health is essential, and this can be achieved through regular exercise, avoiding smoking, and minimizing exposure to pollutants.In conclusion, the alveolus of lung is a vital component of the respiratory system, responsible for the critical process of gas exchange. Understanding its structure and function highlights the importance of lung health and the impact of external factors on our respiratory capabilities. By taking proactive steps to protect our lungs, we can ensure that our alveoli function optimally, allowing us to lead healthier lives. As we continue to learn more about the intricacies of the respiratory system, it becomes increasingly clear that the alveolus of lung plays a fundamental role in our overall well-being.

人类呼吸系统是一个复杂的网络，在我们能够呼吸和维持生命方面发挥着至关重要的作用。这个系统的核心在于肺泡，这是气体交换的关键。肺部由数百万个微小的气囊组成，称为肺泡（alveolus的复数形式），它们是氧气进入血液和二氧化碳被排出的地方。理解肺泡的功能和结构可以让我们深入了解身体的运作以及保持肺部健康的重要性。肺泡是一种显微结构，直径约为0.2到0.5毫米。每个肺泡周围都有一张毛细血管网络，这些毛细血管是促进气体交换的微小血管。当我们吸气时，空气充满肺泡，氧气通过肺泡的薄壁扩散进入血液。同时，代谢产生的废物二氧化碳则从血液中扩散到肺泡中以便被呼出。这个过程对于维持体内适当的氧气水平和去除二氧化碳至关重要，因为高浓度的二氧化碳是有毒的。肺泡的结构专门设计来最大化表面积，同时最小化扩散距离。每个肺部约含有3亿个肺泡，提供了巨大的气体交换表面积——大约相当于一个网球场的大小。肺泡的壁由一层上皮细胞组成，这使得气体扩散变得高效。此外，表面活性剂的存在，这是一种减少表面张力的物质，可以防止肺泡塌陷，并确保它们保持开放以进行气体交换。多种因素会影响肺泡的健康和功能。例如，吸烟会导致肺泡的破坏并导致慢性阻塞性肺病（COPD）的发展。污染和环境毒素也可能损害肺泡的精细结构，导致呼吸问题。保持良好的肺部健康至关重要，这可以通过定期锻炼、避免吸烟和尽量减少接触污染物来实现。总之，肺泡是呼吸系统的重要组成部分，负责气体交换的关键过程。理解其结构和功能突显了肺部健康的重要性，以及外部因素对我们呼吸能力的影响。通过采取积极措施保护我们的肺部，我们可以确保我们的肺泡正常功能，从而过上更健康的生活。随着我们继续学习呼吸系统的复杂性，越来越清楚的是，肺泡在我们的整体健康中发挥着基础性作用。