How does epithelial tissue bruises or wounds? it replaces damaged cells. it creates a barrier over the bruise or wound. it releases a substance that heals the bruise or wound. it stops blood flow in the area of the bruise or wound.

It replaces damaged cells

There are at least three primary functions that are performed by the epithelial tissue.Firstly it provides a great protective covering for all the tissues lying beneath it from radiation, toxins, physical trauma, desiccation and invasion of pathogens. Secondly it helps to regulate the exchange of chemicals between the body cavity and the tissues that lie underneath the epithelial tissues. It also helps in the secretion of the hormones in to the bloods. These are all major but primary functions of the epithelial tissues. From this we can easily understand the importance of the epithelial tissues.