They can all make you ill and be dangerous for the body
By the Pollution of the ocean can kill plant and animal life near by and those who eat those plants and animals
The answer is epithelium. In particular, stratified squamous epithelium. Epithelium is protective tissue that is found on<span> the outer surfaces of </span>organs and blood vessels<span> and </span><span>inner surfaces of </span>cavities<span> in many internal organs. Epithelium contains no blood vessels, and nutrients reach the epithelial cells through diffusion from the underlying tissue.</span>