tubule

简明释义

英[ˈtjuːbjuːl]美[ˈtjʊbjʊl]

n. 小管；细管

英英释义

单词用法

同义词

反义词

例句

1.Objective: To evaluate the tubule occluding ability of tricalcium silicate.

目的：评价硅酸三钙对牙本质小管的阻塞能力。

2.The IV-type chloride cell is a small squamous cell with large prominent crypt and underdeveloped tubule system.

IV型氯细胞为扁平状，细胞体积较小，具有较大的分泌腔，但微细小管系统不发达。

3.In nephrotic rats, the rate of uptake of albumin by the proximal tubule (pt) is decreased.

而在肾病综合症大鼠中，近曲小管(PT)对白蛋白的摄取速率被减弱。

4.Conclusion: LBP could decrease the structural damage of seminiferous tubule caused by higher temperature culture.

结论：LBP可减弱由于培养温度过高所致的曲精小管结构损伤。

5.During the 8 weeks, the proximal and distal tubule had formed and the tubule had developed well during the 10 weeks.

胚胎第8周近、远端小管已形成，第10周已有小管发育较好。

6.Simple cuboidal epithelium lining a tubule (longitudinal cut). Some of the cell boundaries between "blocks" or "cubes" here are quite distinct.

管腔纵切面：单层立方上皮衬于管腔内。一些立方细胞之间的边界相当清晰明显。

7.The positive signal of ISH was mainly distributed in the epithelium of renal tubule and collecting duct.

杂交阳性信号主要分布在肾小管和集合管上皮细胞。

8.The excretion of methyl mercury becomes very difficult because of high enterohepatic circulation and reabsorption by proximal convoluted tubule.

由于甲基汞在体内的肠肝循环和肾脏近曲小管对甲基汞的重吸收效率高，使甲基汞的体外排泄十分困难。

9.There were significant differences ( P< 0.05) in the relative area of the dentinal tubule orifices between two groups.

牙本质小管口的相对面积各组之间的差异均有显著性（P<0.05）。

10.The tubule 小管 in the male reproductive system is responsible for sperm production.

男性生殖系统中的小管 小管 负责精子的产生。

11.In plants, the xylem tubule 小管 transports water from the roots to the leaves.

在植物中，木质部小管 小管 将水从根部运输到叶子。

12.The tubule 小管 structure in the kidneys helps maintain the body's fluid balance.

肾脏中的小管 小管 结构有助于维持身体的液体平衡。

13.The nephron is composed of a long, winding tubule 小管 that plays a crucial role in filtering blood.

肾单位由一条长而弯曲的小管 小管 组成，在过滤血液中起着至关重要的作用。

14.Each tubule 小管 in the respiratory system is essential for gas exchange.

呼吸系统中的每个小管 小管 对气体交换都是必不可少的。

作文

The human body is a complex and intricate system, composed of various structures that work together to maintain life. One of the essential components of this system is the tubule, which plays a crucial role in many physiological processes. A tubule is a small tube-like structure found in various organs and tissues, particularly in the kidneys, where they are involved in the filtration and reabsorption of substances. Understanding the function of tubules can provide insight into how our bodies maintain homeostasis and respond to different conditions.In the kidneys, tubules are part of the nephron, the functional unit responsible for filtering blood and producing urine. Each nephron contains a renal corpuscle and a renal tubule. The renal tubule is further divided into several segments, including the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct. Each segment of the tubule has specific functions that contribute to the overall process of urine formation.The proximal convoluted tubule is where the majority of nutrient reabsorption occurs. Here, valuable substances such as glucose, amino acids, and electrolytes are reabsorbed back into the bloodstream. This process is vital because it prevents the loss of essential nutrients that our bodies need to function properly. The loop of Henle, on the other hand, plays a significant role in concentrating urine and maintaining the body's water balance. It creates a gradient that allows for the reabsorption of water and sodium, ultimately influencing blood pressure and fluid levels in the body.As we move further along the nephron, the distal convoluted tubule continues the process of reabsorption and secretion. Hormones such as aldosterone act on this segment to regulate sodium and potassium levels, highlighting the importance of tubules in electrolyte balance. Finally, the collecting duct receives urine from multiple nephrons and is responsible for the final concentration of urine before it is excreted from the body.Beyond the kidneys, tubules are also found in other systems, such as the respiratory and reproductive systems. In the respiratory system, the bronchioles contain small tubules that help direct airflow to the alveoli, where gas exchange occurs. Similarly, in the reproductive system, the seminiferous tubules in the testes are responsible for the production of sperm, demonstrating the diverse roles that tubules play in various biological processes.Understanding the significance of tubules extends beyond just their anatomical function; it also sheds light on various medical conditions. For instance, damage to the renal tubules can lead to acute kidney injury, a serious condition that requires prompt medical attention. Furthermore, diseases such as diabetes can affect the functioning of tubules, leading to complications in kidney health. By studying tubules and their functions, researchers can develop better treatment strategies for these conditions.In conclusion, tubules are vital structures within the human body that perform essential functions in various organ systems. From the kidneys to the lungs and reproductive organs, tubules contribute to maintaining homeostasis and ensuring that our bodies operate efficiently. By gaining a deeper understanding of tubules, we can appreciate the complexity of human physiology and the importance of these small yet significant structures in our overall health and well-being.

人体是一个复杂而精细的系统，由各种结构组成，这些结构共同工作以维持生命。其中一个重要的组成部分是小管，它在许多生理过程中发挥着关键作用。小管是一种小的管状结构，存在于各种器官和组织中，特别是在肾脏中，它们参与物质的过滤和重吸收。理解小管的功能可以深入了解我们身体如何维持内稳态并对不同条件作出反应。在肾脏中，小管是肾单位的一部分，肾单位是负责过滤血液和产生尿液的功能单位。每个肾单位包含一个肾小体和一个肾小管。肾小管又分为几个部分，包括近端曲小管、亨利氏环、远端曲小管和集合管。小管的每个部分都有特定的功能，促进尿液形成的整体过程。近端曲小管是大多数营养物质重吸收发生的地方。在这里，葡萄糖、氨基酸和电解质等有价值的物质被重新吸收到血液中。这一过程至关重要，因为它防止了我们身体所需的必需营养素的流失。亨利氏环则在浓缩尿液和维持身体水分平衡方面发挥着重要作用。它创造了一个梯度，使水和钠的重吸收成为可能，最终影响血压和体内液体水平。随着我们沿着肾单位向前移动，远端曲小管继续重吸收和分泌的过程。激素如醛固酮在这一部分起作用，以调节钠和钾的水平，突显了小管在电解质平衡中的重要性。最后，集合管接收来自多个肾单位的尿液，并负责在尿液排出体外之前的最终浓缩。除了肾脏，小管还存在于其他系统中，如呼吸系统和生殖系统。在呼吸系统中，支气管含有小小管，帮助将气流引导到肺泡，在那里进行气体交换。同样，在生殖系统中，睾丸中的精小管负责产生精子，展示了小管在各种生物过程中所扮演的多样角色。理解小管的重要性不仅限于其解剖功能；它还揭示了各种医学条件。例如，肾小管的损伤可能导致急性肾损伤，这是一个严重的情况，需要及时的医疗干预。此外，糖尿病等疾病可能会影响小管的功能，从而导致肾脏健康的并发症。通过研究小管及其功能，研究人员可以开发出更好的治疗策略来应对这些情况。总之，小管是人体内重要的结构，在各种器官系统中执行基本功能。从肾脏到肺部和生殖器官，小管有助于维持内稳态并确保我们的身体高效运作。通过深入了解小管，我们可以欣赏到人体生理的复杂性，以及这些小而重要的结构在我们整体健康和幸福中的重要性。