alveolus of lung

简明释义

肺泡

英英释义

例句

1.Each alveolus of lung is surrounded by a network of capillaries.

每个肺泡周围都有一个毛细血管网络。

2.In patients with pneumonia, the alveolus of lung can become filled with fluid.

在肺炎患者中，肺泡可能会充满液体。

3.Damage to the alveolus of lung can lead to respiratory distress.

对肺泡的损害可能导致呼吸窘迫。

4.The structure of the alveolus of lung allows for efficient gas exchange.

肺泡的结构允许高效的气体交换。

5.The exchange of oxygen and carbon dioxide occurs in the alveolus of lung.

氧气和二氧化碳的交换发生在肺泡。

作文

The human respiratory system is a complex network that allows us to breathe and exchange gases with the environment. At the heart of this system are the tiny air sacs known as alveolus of lung, which play a crucial role in the process of respiration. These microscopic structures are located at the end of the bronchioles, the smallest branches of the respiratory tract, and are essential for gas exchange between the air we inhale and the blood in our capillaries.Each alveolus of lung is surrounded by a thin layer of capillaries, which are small blood vessels that carry oxygen-depleted blood from the body to the lungs. When we breathe in, air fills the alveolus of lung, and oxygen diffuses across the alveolar membrane into the blood. Simultaneously, carbon dioxide, which is a waste product of cellular metabolism, moves from the blood into the alveolus of lung to be exhaled. This process is known as external respiration and is vital for maintaining the body's oxygen levels.The structure of the alveolus of lung is uniquely designed to maximize surface area for gas exchange. Each lung contains millions of these tiny air sacs, providing a vast surface area—approximately the size of a tennis court—where oxygen and carbon dioxide can be exchanged efficiently. The walls of the alveolus of lung are made up of a single layer of epithelial cells, allowing for easy diffusion of gases. Additionally, a substance called surfactant coats the inner surface of the alveolus of lung, reducing surface tension and preventing the alveoli from collapsing during exhalation.However, the health of the alveolus of lung can be compromised by various factors, including smoking, pollution, and infections. Conditions such as chronic obstructive pulmonary disease (COPD) and pneumonia directly affect the function of the alveolus of lung, leading to reduced gas exchange and difficulty in breathing. Understanding the importance of these air sacs is crucial for recognizing how lifestyle choices and environmental factors can impact respiratory health.In conclusion, the alveolus of lung is a vital component of the respiratory system, facilitating the exchange of oxygen and carbon dioxide. Its unique structure and function highlight the intricate design of the human body and the importance of maintaining lung health. By being aware of the factors that can harm the alveolus of lung, we can take proactive steps to protect our respiratory system and ensure that we continue to enjoy the benefits of healthy breathing throughout our lives.

人类呼吸系统是一个复杂的网络，使我们能够呼吸并与环境交换气体。在这个系统的核心是被称为肺泡的小气囊，它们在呼吸过程中起着至关重要的作用。这些微小的结构位于细支气管的末端，细支气管是呼吸道的最小分支，对于空气和血液之间的气体交换至关重要。每个肺泡周围都有一层薄薄的毛细血管，这些毛细血管是携带缺氧血液从身体流向肺部的小血管。当我们吸气时，空气充满肺泡，氧气通过肺泡膜扩散到血液中。同时，二氧化碳作为细胞代谢的废物，从血液移动到肺泡中以便呼出。这个过程被称为外呼吸，对于维持身体的氧气水平至关重要。肺泡的结构独特，旨在最大化气体交换的表面积。每个肺部包含数百万个这样的微小气囊，提供了一个巨大的表面积——大约是一个网球场的大小——可以高效地进行氧气和二氧化碳的交换。肺泡的壁由一层上皮细胞构成，允许气体轻易扩散。此外，一种叫做表面活性剂的物质覆盖在肺泡的内表面，降低表面张力，防止肺泡在呼气时塌陷。然而，肺泡的健康可能会受到各种因素的影响，包括吸烟、污染和感染。慢性阻塞性肺病（COPD）和肺炎等疾病直接影响肺泡的功能，导致气体交换减少和呼吸困难。理解这些气囊的重要性对于认识生活方式选择和环境因素如何影响呼吸健康至关重要。总之，肺泡是呼吸系统的重要组成部分，促进氧气和二氧化碳的交换。它的独特结构和功能突显了人体的复杂设计，以及保持肺部健康的重要性。通过意识到可能损害肺泡的因素，我们可以采取积极措施来保护我们的呼吸系统，确保在生活的整个过程中继续享受健康呼吸的益处。