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Classification of Epithelial Tissues: Overview

Classification of Epithelial Tissues: Overview

Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and thin), cuboidal (square-like, as wide as it is tall), or columnar (rectangular, taller than it is wide). Additionally, the nucleus shape helps identify the type of epithelial cells. Squamous cells have flattened disc-shaped nuclei, cuboidal cells have spherical nuclei, and columnar cells have elongated nuclei.
Based on the number of cell layers,...

Classification of Epithelial Tissues: Glandular Epithelium

Classification of Epithelial Tissues: Glandular Epithelium

The glandular epithelium is made of one or more epithelial cells modified to synthesize and secrete chemical substances. Glandular epithelia can be classified based on cell number. Unicellular glands have individual secretory cells scattered across the epithelial monolayer. In contrast, multicellular glands consist of a hollow tubular duct attached to the cluster of secretory cells located in the deep pockets.
Multicellular glands are formed during early development when epithelial budding...

Classification of Epithelial Tissues: Stratified Epithelium

Classification of Epithelial Tissues: Stratified Epithelium

Stratified epithelium consists of several stacked layers of cells. They provide the durability to withstand constant physical and chemical attacks. Stratified epithelium is named after the shape of the most apical layer of cells. Stratified squamous epithelium is the most common type found in the human body. In this tissue, the apical cells are squamous, whereas the basal layer contains either columnar or cuboidal cells. The basal cells divide to form new daughter cells, which gradually become...

Classification of Epithelial Tissues: Simple Epithelium

Classification of Epithelial Tissues: Simple Epithelium

Simple epithelium consists of a single layer of cells that lines body cavities and blood vessels. The shape of the cells in the epithelium reflects the function of the tissue. Cells in simple squamous epithelium appear as thin scales with flat, elliptical nuclei that mirror the form of the cell.
Because of the thinness of the cells, simple squamous epithelium is present where the rapid passage of chemical compounds is observed. For example, the endothelium that lines the capillaries and vessels...

Epithelial Tissues and Their Functions

Epithelial Tissues and Their Functions

Epithelial tissues are large sheets of cells covering all of the surfaces of the body. These surfaces can be internal or external, for example, skin, airways, the digestive tract, the urinary system, and the reproductive system. Hollow organs and body cavities that do not connect to the body's exterior, including blood vessels and serous membranes, are lined by epithelial tissue known as the endothelium.
Epithelial tissues provide the body's first line of protection from physical, chemical, and...

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Related Experiment Video

Updated: Jun 8, 2026

Engineering Three-dimensional Epithelial Tissues Embedded within Extracellular Matrix

Engineering Three-dimensional Epithelial Tissues Embedded within Extracellular Matrix

Published on: July 10, 2016

Computational modeling of epithelial tissues.

Rod Smallwood¹

¹Department of Computer Science, University of Sheffield, Regent Court, 211 Portobello, Sheffield S1 4DP, UK.

Wiley Interdisciplinary Reviews. Systems Biology and Medicine

|September 14, 2010

Summary

Computational modeling of epithelial tissues uses continuum or individual-based approaches to understand tissue organization. This review focuses on cell to whole tissue behavior, crucial for homeostasis, wound healing, and understanding carcinomas.

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Area of Science:

Biophysics
Computational Biology
Tissue Engineering

Background:

Epithelial tissues form vital body barriers (skin, organ linings) with essential barrier, secretory, and transport functions.
These tissues are crucial for homeostasis and wound healing, and are the origin of carcinomas.
Their structure (thin, few cell types, minimal extracellular matrix) lends itself to computational modeling.

Purpose of the Study:

To review computational modeling of epithelial tissues at the individual cell to whole tissue level.
To focus on organizational aspects and their relevance to tissue behavior.
To indicate the relevance of related fields, such as angiogenesis modeling.

Main Methods:

Review of existing literature on computational modeling of epithelial tissues.
Focus on two primary modeling approaches: continuum (tissue-level equations) and individual-based (emergent cellular behavior).
Exploration of how these approaches can be integrated.

Main Results:

Epithelial tissue behavior can be modeled computationally from subcellular to whole tissue levels.
Key organizational aspects are central to understanding tissue function, homeostasis, and disease.
Both continuum and individual-based modeling approaches offer valuable insights, and are not mutually exclusive.

Conclusions:

Computational modeling provides a powerful framework for understanding epithelial tissue organization and function.
The interplay between cellular behavior and tissue-level properties is critical for biological processes.
Further integration of different modeling scales and related biological processes (e.g., angiogenesis) will enhance predictive power.