What structural feature do epithelia that provide for protection have in common?

Epithelial tissue constitutes an uninterrupted and continuous layer of cells. They form the linings of organs and body cavities for the protection. Epithelial cells are polarized with an apical surface which opposes the lumen of a tube or the external environment and a basal surface that attaches to the basal lamina. The epithelial tissues are specialized mainly for four functions, one of those function is protection, for this purpose they themselves are being Supported by the Connective Tissues. Epithelial cells are continuously renewed and these cells regenerate themselves with the help of mitosis. Cell linkages are well-employed in epithelial tissues.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.