👉 Epithelial tissue, also known as skin or mucous membrane, is a type of connective tissue that covers and serves as an external barrier to protect the body from harmful substances. It includes cells such as keratinocytes (hair cells), which produce sebum, oils, and other lipids to provide protection against harsh conditions; epidermal cells, which cover and support the surface of the skin; and dermis cells, which are responsible for providing a soft, smooth surface for the
epithelia