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- understand the morphological differences between stratified squamous keratinized and non-keratinized epithelial tissues
- know where you find stratified squamous keratinized epithelial tissue
- know where you find stratified squamous non-keratinized epithelial tissues
Here is a comparative difference between the two types of stratified squamous epithelial tissues. It is important that you know the basic morphological differences between these two tissues and where they are located.
Keratinized stratified squamous epithelium
- multiple layers of squamous cells
- the apical layer of cells are dead and filled with the protein keratin
- this is found in the epidermis (top layer of skin)
- is used to hinder water loss and creates a physical barrier for us from the outside world
Nonkeratinized stratified squamous epithelium
- multiple layers of squamous cells
- none of the cells are dead
- found in moist slippery areas of the body such as the vagina, oral mucosa, tongue and esophagus
Source: Self Made
Here is an overview about the differences between stratified squamous epithelial (keratinized & non-keratinized) tissues. These are relatively easy to distinguish morphologically as you will see; just focus on the apical layer of cells. Later I will make packets about the integumentary system where the epidermis (stratified squamous keratinized) will be broken down with more depth.
Source: Self made with images from Marieb & http://www.udel.edu/biology/Wags/histopage/colorpage/colorpage.htm
