Exploring Epithelial Tissue Concepts

Front

What is epithelial tissue?

Back

Epithelial tissue is a type of tissue that forms the protective outer layer of the body and lines internal organs and cavities. It serves various functions including protection, absorption, secretion, and sensation.

Front

What are the two main types of epithelial tissue based on cell layers?

Back

Simple epithelium (one layer of cells) and stratified epithelium (multiple layers of cells).

Front

How do you distinguish between simple and stratified epithelium?

Back

By the number of cell layers.

Front

Where is simple squamous epithelium commonly found?

Back

In areas where rapid diffusion or filtration is required, such as the air sacs of the lungs and the lining of blood vessels.

Front

What is the primary function of stratified squamous epithelium?

Back

Protection against abrasion and pathogens, commonly found in the skin.

Front

What is the significance of the basement membrane in epithelial tissue?

Back

The basement membrane provides structural support and anchors the epithelium to underlying connective tissue.

Front

Why are epithelial tissues considered avascular?

Back

They rely on diffusion from underlying tissues for nutrients.

Front

What is the role of cilia in certain epithelial tissues?

Back

Cilia help in the movement of substances across the epithelial surface, such as in the respiratory tract where they move mucus.

Front

What is the main structural unit of all living organisms?

Back

Cell.

Front

What are the four main types of tissues in the human body?

Back

Epithelial, connective, muscle, and nervous tissue.