alveolus

简明释义

英[ælˈviːələs;ˌælviˈəʊləs]美[ælˈviːələs]

n. 肺泡；小窝

复 数 a l v e o l i

英英释义

单词用法

同义词

反义词

例句

1.Around each alveolus there are capillaries, which are very small blood vessels.

在每一肺泡周围有许多毛细管，它们是很小的血管。

2.The brown coarsely granular material in macrophages in this alveolus is hemosiderin that has accumulated as a result of the breakdown of RBC's and release of the iron in heme.

图示：肺泡内巨噬细胞含铁血黄素沉着（呈褐色粗糙颗粒）。是红细胞血红蛋白降解后所产生和释放的。

3.Results Allergic alveolus inflammation can lead to pleural effusion.

炎可以并发胸腔积液。

4.Bone grafting of the alveolus is an essential step in the reconstruction of the orofacial cleft deformity.

牙槽突裂骨移植是口腔颌面部裂隙畸形重建的重要步骤。

5.Air inside an alveolus gives oxygen to blood and receives carbon dioxide from blood.

肺泡里的空气给血液供氧，同时接收血液里的二氧化碳。

6.The alveolus edema just can be improved in 1 to 3 days with cardiotonic and diuretic therapy, so it needs follow-up radiographies in short time.

在治疗过程追踪复查中，心衰肺水肿在强心利尿等治疗下，通常1至3天内病情好转，需要短期复查；

7.When you breathe in, air travels down the trachea and into the alveoli (肺泡).

当你吸气时，空气通过气管进入肺泡。

8.The human lung contains millions of alveoli (肺泡) that are responsible for gas exchange.

人类的肺部包含数百万个肺泡，它们负责气体交换。

9.In a healthy lung, each alveolus (肺泡) is lined with a thin layer of cells to facilitate oxygen absorption.

在健康的肺中，每个肺泡都被一层薄薄的细胞覆盖，以促进氧气的吸收。

10.Damage to the alveoli (肺泡) can lead to respiratory diseases such as emphysema.

对肺泡的损害可能导致如肺气肿等呼吸系统疾病。

11.The surface area of the alveoli (肺泡) in the lungs is crucial for efficient oxygen exchange.

肺部肺泡的表面积对于有效的氧气交换至关重要。

作文

The human body is a complex and intricate system, where every part plays a crucial role in maintaining overall health and functionality. One of the most fascinating components of our respiratory system is the alveolus, which are tiny air sacs located in the lungs. These microscopic structures are essential for the process of gas exchange, allowing oxygen to enter the bloodstream while simultaneously removing carbon dioxide from the body. Understanding the function and significance of the alveolus can deepen our appreciation for the respiratory system and its vital role in sustaining life.Each lung contains millions of alveoli, which are clustered like grapes at the end of the bronchioles. The walls of these alveoli are incredibly thin, consisting of only a single layer of cells, which facilitates the efficient transfer of gases. When we inhale, air fills the alveolus, and oxygen diffuses across the alveolar membrane into the surrounding capillaries. This process is driven by concentration gradients; oxygen levels in the alveolus are higher than in the blood, prompting oxygen to move into the bloodstream.Conversely, carbon dioxide, which is a waste product of cellular metabolism, moves from the blood into the alveolus to be exhaled. This exchange of gases is not only vital for providing oxygen to our cells but also for regulating the pH levels in our body, as carbon dioxide can affect acidity.The structure of the alveolus is adapted to maximize surface area, which is crucial for efficient gas exchange. The vast number of alveoli in our lungs creates an extensive surface area—approximately the size of a tennis court—allowing for optimal oxygen absorption. Additionally, the presence of a surfactant, a substance that reduces surface tension, prevents the alveoli from collapsing and ensures they remain open during breathing.However, the health of our alveoli can be compromised by various factors, including smoking, pollution, and infections. Conditions such as chronic obstructive pulmonary disease (COPD) and pneumonia can damage the alveoli, leading to difficulty in breathing and reduced oxygen intake. Thus, maintaining healthy alveoli is essential for overall respiratory health.In conclusion, the alveolus is a remarkable component of the respiratory system, playing a critical role in gas exchange. Its unique structure and function highlight the complexity of our bodies and the importance of caring for our respiratory health. By understanding how the alveolus works, we can better appreciate the delicate balance that sustains life and the need to protect our lungs from harm. Whether through avoiding harmful substances or engaging in regular physical activity, we can support the health of our alveoli and, in turn, enhance our overall well-being.

人体是一个复杂而精细的系统，每个部分在维持整体健康和功能中都扮演着至关重要的角色。我们呼吸系统中最迷人的组成部分之一是肺泡，它是位于肺部的微小气囊。这些微观结构对于气体交换过程至关重要，它们允许氧气进入血液，同时将二氧化碳从体内排出。理解肺泡的功能和重要性可以加深我们对呼吸系统的欣赏，以及它在维持生命中的重要作用。每个肺部包含数百万个肺泡，它们像葡萄一样聚集在细支气管的末端。这些肺泡的壁极其薄，仅由一层细胞组成，这有助于气体的高效转移。当我们吸气时，空气充满肺泡，氧气通过肺泡膜扩散到周围的毛细血管中。这个过程是由浓度梯度驱动的；肺泡中的氧气水平高于血液中的氧气水平，从而促使氧气进入血液。相反，二氧化碳作为细胞代谢的废物，则从血液中移动到肺泡中以便被呼出。这种气体交换不仅对为我们的细胞提供氧气至关重要，还对调节我们体内的pH水平至关重要，因为二氧化碳会影响酸碱度。肺泡的结构经过适应，以最大化表面积，这对于高效的气体交换至关重要。我们肺部的肺泡数量庞大，形成了一个广阔的表面积——大约相当于一个网球场的大小——这使得氧气的吸收达到最佳。此外，表面活性剂的存在（这是一种降低表面张力的物质）可以防止肺泡塌陷，并确保它们在呼吸过程中保持开放。然而，我们的肺泡健康可能会受到多种因素的影响，包括吸烟、污染和感染。慢性阻塞性肺病（COPD）和肺炎等疾病可能会损害肺泡，导致呼吸困难和氧气摄入减少。因此，维持健康的肺泡对于整体呼吸健康至关重要。总之，肺泡是呼吸系统中一个显著的组成部分，在气体交换中发挥着关键作用。它独特的结构和功能突显了我们身体的复杂性以及关心我们呼吸健康的重要性。通过了解肺泡的工作原理，我们可以更好地欣赏维持生命的微妙平衡，以及保护我们肺部免受伤害的必要性。无论是通过避免有害物质还是进行定期体育活动，我们都可以支持肺泡的健康，从而增强我们的整体福祉。