HOSA Dental Terminology Practice

What characterizes the keratinized layer of tissue?

1. It is composed of living cells with nuclei

2. It is a tough outermost surface layer composed of cells with no nuclei

3. It is a soft inner layer of the skin

4. It aids in the sensation of touch

The correct answer is: It is a tough outermost surface layer composed of cells with no nuclei

The keratinized layer of tissue is characterized as a tough outermost surface layer comprising cells that have lost their nuclei. This layer, primarily found in areas of the skin exposed to friction and abrasion, serves critical functions in protecting underlying tissues from mechanical damage, pathogens, and dehydration. The process of keratinization is essential for the development of a resilient barrier, as the cells become filled with keratin, a key protein that contributes to structural strength and waterproofing. The presence of flattened, anucleated cells in the keratinized layer is a hallmark of this tissue type, distinguishing it from other tissue layers that contain living cells with nuclei. This structural composition is designed to enhance the durability and protective functions of the skin, especially in areas subject to constant wear. By providing a robust barrier, the keratinized layer plays a vital role in maintaining the integrity of the skin and overall health of the organism.