How the word "きかん（器官）" is translated into English
目は光を感じる器官だと、理科の授業で習いました。
たばこは体のいろいろな器官に悪い影響を与えます。
年をとると、体の器官の働きが弱くなるそうです。
"きかん（器官）" is in the lesson "Body" (Level 27), along with 8 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.
