The outer epithelial layer may include cells of several types including sensory cells, gland cells and stinging cells.
ðɪ ˈaʊɾɚɹ ˌɛpɪθˈɛlɪəl lˈeɪɚ mˈeɪ ɪŋklˈuːd sˈɛlz ʌv sˈɛvɹəl tˈaɪps ɪŋklˈuːdɪŋ sˈɛnsɚɹi sˈɛlz, ɡlˈænd sˈɛlz ænd stˈɪŋɪŋ sˈɛlz.