Epithelial Tissue
Question 1: What exactly is an Epithelial Tissue?
Answer:
The external covering of the skin is framed by epithelial tissue, which likewise lines the body pit. It is responsible for the lining of the respiratory, digestive, reproductive, and excretory tracts. They are responsible for a variety of functions such as absorption, protection, sensation, and secretion.
Question 2: What are the Properties of the Basement Membrane in Epithelial Tissue?
Answer:
The basement membrane is a thin extracellular layer composed of two layers, the basal and reticular laminae.
- The basal lamina is located closer to the epithelial cells and contains proteins such as laminin and collagen, as well as some glycoproteins and proteoglycans.
- The reticular lamina is found beneath the connective tissue and is closer to it. It contains collagen protein, which is produced by connective tissue cells called fibroblasts.
Question 3: What are the Different types of Epithelial Tissue based on their shape?
Answer:
- Squamous epithelium consists of thin, flat cells.
- The cuboidal epithelium consists of short cylindrical cells with hexagonal cross-sections.
- The columnar epithelium consists of long or columnar cylindrical cells with a nucleus at the base.
Question 4: What are the Different types of Epithelial Tissue based on the Number of Layers present?
Answer:
Simple epithelium and stratified or compound epithelium are two types of epithelial tissue.
- Simple epithelium is made up of one layer of cells and primarily serves a secretory or absorptive function.
- Compound (Stratified) Epithelium is composed of two or more layers of cells and serves primarily as a protective layer.
Question 5: What are the Functions of Epithelial Tissues?
Answer:
- They cover a variety of body surfaces, including the inner lining of the mouth, digestive tract, secretory glands, and the lining of hollow parts of every organ, including the heart, lungs, eyes, and urogenital tract.
- The cells that make up epithelial tissue are held together by a structure known as tight junctions.
Epithelial Tissue
A structural organisation in animals begins with the smallest fundamental unit – the cell. Tissues are made up of a collection of cells that all serve the same purpose. When tissues join together to perform specific functions, organs form. All organisms in the animal kingdom are multicellular, but their cell organisation does not follow the same pattern.
Every cell in our bodies is trained to perform a specific function. A tissue is made up of similar types of cells that are classified based on their structure and functions. The human body is made up of four different types of tissue: epithelial, connective, neural, and muscular.