epithelia

简明释义

英[ˌepɪˈθiːlɪə]美[ˌepəˈθilɪə]

n. 上皮细胞（epithelium 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Objective To investigate the effect of nutritional status on apoptosis and proliferation of oral mucosal epithelia cells.

目的研究不同营养状态对口腔粘膜细胞凋亡和增殖的影响。

2.Vitamins function as photoreceptor mechanism of retina, maintenance of integrity of epithelia, lysosome stability, glycoprotein synthesis.

它的作用有：视网膜光受体机制、 护上皮细胞的完整性、酶体的稳定性、蛋白的合成等。

3.The ocular surface consists of the tear film, the epithelia of the cornea and conjunctiva.

眼表由角膜上皮、结膜上皮及表面的泪膜共同组成。

4.Objective to observe on the effect of 9402 to the sensibility of the epithelia of mouse small intestinal crypts.

目的观察9402号对小鼠小肠隐窝上皮细胞的增敏作用。

5.To quantify the morphological alteration of polarized epithelia for providing objective and quantitative indexes for forensic pathological diagnosis.

以及对极性化上皮细胞进行形态学观察及测量，为法医病理学诊断电损伤和烧伤提供客观量化指标。

6.Up to date, no direct evidence which shows EBV infection can induce carcinoma of nasopharyngeal epithelia cells.

迄今为止，尚未有EBV感染鼻咽上皮细胞致癌的直接实验证据。

7.The human body is covered by various types of epithelia, which serve as protective layers.

人类身体被各种类型的上皮覆盖，作为保护层。

8.In the lungs, the epithelia facilitate gas exchange.

在肺部，上皮促进气体交换。

9.Certain diseases can affect the integrity of the epithelia in the gastrointestinal tract.

某些疾病可能会影响胃肠道中上皮的完整性。

10.The epithelia in our skin provide a barrier against pathogens.

我们皮肤中的上皮提供了对病原体的屏障。

11.Researchers study the regeneration of epithelia to develop better wound healing techniques.

研究人员研究上皮的再生，以开发更好的伤口愈合技术。

作文

The human body is a complex system made up of various types of cells and tissues that work together to maintain health and functionality. One of the most important types of tissue in the body is known as epithelia, which plays a crucial role in protecting the underlying structures from damage, infection, and dehydration. 上皮 tissues are found throughout the body, lining surfaces and cavities, and they serve multiple functions depending on their location and structure. Epithelial tissues are classified based on the number of layers of cells and the shape of those cells. There are two main types of epithelia: simple and stratified. Simple epithelia consist of a single layer of cells, allowing for easy diffusion and absorption. This type is commonly found in areas where substances need to pass through quickly, such as in the alveoli of the lungs or the lining of the intestines. On the other hand, stratified epithelia have multiple layers of cells, providing greater protection against physical and chemical wear. This type is typically found in areas subject to abrasion, such as the skin and the lining of the mouth. Another classification of epithelia is based on cell shape. The three main shapes of epithelial cells are squamous (flat), cuboidal (cube-shaped), and columnar (tall and column-like). Squamous epithelia facilitate rapid diffusion and filtration, while cuboidal and columnar epithelia are more involved in secretion and absorption processes. For example, cuboidal epithelia are often found in glands and the kidney tubules, where they help in the secretion of hormones and the reabsorption of water. The role of epithelia extends beyond mere protection and absorption. They also play a vital role in sensation and secretion. Specialized epithelial cells can function as sensory receptors, allowing the body to respond to external stimuli. Additionally, many glands are composed of epithelia, which secrete various substances such as hormones, enzymes, and mucus. This secretory function is essential for maintaining homeostasis and facilitating communication between different systems in the body. Furthermore, epithelia are involved in the process of regeneration. These tissues have a remarkable ability to heal and regenerate after injury, which is crucial for maintaining the integrity of barriers against pathogens and environmental damage. For instance, when the skin is cut, the epithelia at the wound site rapidly proliferate to cover the exposed area and restore the protective barrier. In conclusion, epithelia are an essential component of the human body, serving multiple functions that are vital for survival. Their roles in protection, absorption, secretion, sensation, and regeneration highlight the complexity and importance of these tissues. Understanding the structure and function of epithelia not only enhances our knowledge of human biology but also underscores the significance of maintaining healthy epithelial tissues for overall well-being.

人体是一个复杂的系统，由各种类型的细胞和组织组成，这些细胞和组织共同工作以维持健康和功能。其中一种最重要的组织被称为上皮，它在保护下层结构免受损伤、感染和脱水方面发挥着关键作用。上皮组织遍布全身，衬托着表面和腔体，根据其位置和结构，它们具有多种功能。 上皮组织根据细胞层数和形状进行分类。主要有两种类型的上皮：单层和复层。单层上皮由单层细胞组成，便于扩散和吸收。这种类型通常出现在需要快速通过物质的区域，例如肺泡或肠道的内衬。另一方面，复层上皮则有多层细胞，提供更大的保护，抵御物理和化学磨损。这种类型通常出现在易受磨损的区域，如皮肤和口腔内衬。 上皮的另一种分类是基于细胞形状。上皮细胞的三种主要形状是扁平（鳞状）、立方（立方体形）和柱状（高而柱状）。鳞状上皮促进快速扩散和过滤，而立方形和柱状上皮则更多地参与分泌和吸收过程。例如，立方形上皮通常存在于腺体和肾小管中，帮助分泌激素和重吸收水分。 上皮的作用不仅限于保护和吸收。它们在感觉和分泌中也发挥着重要作用。专门的上皮细胞可以作为感觉受体，使身体能够响应外部刺激。此外，许多腺体由上皮组成，分泌各种物质，如激素、酶和粘液。这种分泌功能对于维持体内平衡和促进不同系统之间的沟通至关重要。 此外，上皮还参与再生过程。这些组织具有显著的愈合和再生能力，对于保持对病原体和环境损害的屏障完整性至关重要。例如，当皮肤受伤时，伤口部位的上皮迅速增殖以覆盖暴露区域，恢复保护屏障。 总之，上皮是人体的重要组成部分，执行多种对生存至关重要的功能。它们在保护、吸收、分泌、感觉和再生中的作用突显了这些组织的复杂性和重要性。了解上皮的结构和功能不仅增强了我们对人体生物学的认识，也强调了维持健康上皮组织对整体健康的重要性。