这关键区别伪分层和过渡上皮之间伪分层上皮只有一个连接到基底膜的细胞层,而过渡上皮具有多个不同形状的细胞。
上皮组织是为我们身体提供第一道保护的四种组织之一。它是覆盖人体表面并在器官和身体腔外部线的细胞片。上皮组织是血管的,通过通过基底膜扩散吸收营养。根据细胞的形状和细胞层的数量,将上皮组织分为几类。假性上皮和过渡上皮是两个这样的类别。伪分层上皮具有单个细胞层,其中细胞的形状不规则,使外观多于一层。过渡上皮是一种专业分层上皮in which the shape of the cells can vary.
CONTENTS
1。概述和关键差异
2。什么是假上皮
3。什么是过渡上皮
4。伪分层与过渡上皮之间的相似性
5。Side by Side Comparison – Pseudostratified vs Transitional Epithelium in Tabular Form
6.Summary
什么是假上皮?
伪分层的上皮作为分层上皮出现,但它具有单个细胞层,所有细胞都接触地下膜。细胞的核位于假上皮的不同层中。此外,细胞的高度变化。
在显微镜下,伪分层的上皮作为分层上皮出现,由几个细胞层组成,因为细胞的高度不同。只有最高的细胞到达表面。但是,每个细胞都位于地下膜上。由于这种幻觉,上皮组织被称为假性分层。大多数细胞都有cilia,并且可以沿着气管,支气管和其他呼吸结构看到它们。伪分层上皮的主要功能是捕获灰尘和传染性颗粒。它还为这些组织提供保护。
什么是过渡上皮?
过渡上皮是一种专业分层上皮composed of multiple cell layers (about six layers). The shapes of the cells vary. Transitional epithelium is found only in the urinary system, especially in the bladder,尿道和子宫。过渡上皮中的细胞可以扩展和收缩。此外,它们可以改变形状和结构。
膀胱是空的时,上皮是康沃变频器luted and has cuboidal apical cells with convex, umbrella shaped, apical surfaces. It appears thicker and more multilayered. When the bladder fills with urine, epithelium loses its convolutions and the apical cells changes from cuboidal to squamous. It appears more stretched out and less stratified. The transitional epithelium in the urinary system is capable of stretching and contracting to accommodate fluctuating volumes of urine.
What are the Similarities Between Pseudostratified and Transitional Epithelium?
- 假性化和过渡性上皮是两种类型的上皮组织。
- 这两个上皮对我们都非常重要。
伪分层和过渡上皮之间有什么区别?
Pseudostratified epithelium is a type of epithelium which has a single layer of cells of various heights. In contrast, transitional epithelium is a type of stratified epithelium composed of multiple layers of cells that are capable of contracting and expanding. So, this is the key difference between pseudostratified and transitional epithelium. Furthermore, pseudostratified epithelium is found in the respiratory tract, while transitional epithelium is found only in the urinary tract.
Moreover, pseudostratified epithelium traps dust and other foreign particles, while transitional epithelium allows urinary tract organs to expand and stretch. Thus, this is the main functional difference between pseudostratified and transitional epithelium. Another difference between pseudostratified and transitional epithelium is that all cells of pseudostratified epithelium touch the basal membrane while only the lowest cell layer of transitional epithelium touches the basal membrane.
下图总结了伪分层和过渡上皮之间的差异。
摘要 - 伪分层与过渡上皮
伪分层和过渡上皮之间的关键区别在于,假上皮仅具有一个细胞层,而过渡上皮具有多层层。此外,伪分层细胞的细胞处于各种高度,其核处于不同的水平。过渡上皮的细胞具有不同的形状和结构。更重要的是,细胞可以收缩和扩展。此外,在呼吸道中发现了假上皮,而过渡上皮则在尿路中发现。
参考:
1.“过渡上皮”。生物学词典,2020年,在这里可用。
图片提供:
1.卡米尔·达纳克(Kamil Danak)的“伪造柱上皮” - 自己的作品(CC BY-SA 3.0)通过下议院维基梅迪亚
2.用户的“ harnblase urlothel”:Polarlys - 自己的工作(CC由2.5)通过下议院维基梅迪亚
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