“intestines” in Japanese is 腸, read chou (ちょう). It is a Grade 4 Kyōiku kanji, taught in year 4 of Japanese elementary school, and appears in words such as 胃腸 (stomach and intestines).
What does 腸 mean?
腸の調子が悪い。
Same sound, different character — the classic trap. Compare them side by side: