the skin has a permeable barrier that is created in the external and internal of the body. which type of tissue in the skin give it this function? and how does this structure of the tissue type give it that function?
The type of tissue in the skin that gives it a permeable barrier function is the stratified squamous epithelium. This tissue type is made up of multiple layers of flattened cells that are tightly packed together. These cells are constantly being shed and replaced by new cells from the basal layer.
The stratified squamous epithelium creates a physical barrier that helps to prevent the entry of pathogens, chemicals, and other harmful substances into the body. The tight junctions between the cells also help to ensure that these substances cannot easily pass through the tissue.
Additionally, the epidermis, which is the outer layer of the skin made up of stratified squamous epithelium, contains keratinocytes that produce the protein keratin. Keratin helps to make the skin waterproof and prevents excessive water loss, while also providing protection against mechanical stress and ultraviolet radiation.
Therefore, the structure of the stratified squamous epithelium tissue, with its multiple layers of tightly packed cells and the production of keratin, gives the skin its permeable barrier function.