The cell theory includes these important ideas:
ð ə WORD_BOUNDARY s ɛ l WORD_BOUNDARY θ iə ɹ i WORD_BOUNDARY ɪ ŋ k l uː d z WORD_BOUNDARY ð iː z WORD_BOUNDARY ɪ m p ɔ ɹ t ə n t WORD_BOUNDARY aɪ d iə z WORD_BOUNDARY