noun ダウンロード 🔗共有 上皮 A membranous tissue composed of one or more layers of cells which forms the covering of most internal and external surfaces of the body and its organs: internally including the lining of vessels and other small cavities, and externally being the skin. Examples : "The doctor examined the tissue sample to see if the epithelium was healthy. " 医者は上皮が健康かどうかを確認するために、組織サンプルを調べました。 medicine physiology anatomy organ body biology science AIとチャット語彙ゲーム読解練習