Zoology lecture notes and study materials

Difference between Keratinized and Non-keratinized Epithelial Tissues


Keratinized vs Nonkeratinized Epithelium

Keratinized vs Non-keratinized Epithelium
Difference between Keratinized and Non-keratinized Epithelial Tissues

Epithelium constitutes the outer layer of body surfaces, linings of the alimentary canal and the walls of hollow structures. It covers the internal or external surfaces of the body. The functions epithelial tissue is to protect the underlying tissues from physical damages, infection, desiccation, UV radiation and heat loss. Based on the presence of Keratin, the epithelial tissues are categorized into Keratinized epithelium and Non-keratinized epithelial tissues. Keratins are a diverse group of structural proteins that form the intermediate filament network and they provide the structural integrity of keratinized epithelial cells.

The present post discusses the Difference between Keratinized and Non-keratinized Epithelial Cells.

Continue reading

biological chemistry

Difference between Collagen and Keratin – Comparison Table


Collagen vs Keratin

Collagen vs Keratin
(Similarities and Differences between Collagen and Keratin)

Collagen and Keratin are the main structural proteins. They are two main families of fibrous proteins and are abundantly present in the extracellular matrix and various connective tissues in animals. 

Collagen: A linear structural fibrous protein abundantly found in the connective tissue and extracellular space of the cells. They are also found in tendons, ligaments, cornea, cartilage, bone, blood vessels, intervertebral discs and the dentine in teeth.

Keratin: A structural protein abundantly present in epithelial cells. They protect the epithelial cells from damage or stress. Keratin is also present in appendages such as feathers, hairs and nail, horn, claws and hooves of animals. Keratin is the structural material that makes the human skin.

The present post discusses the similarities and Differences between Collagen and Keratin with a Comparison Table.

Continue reading