Karada (体) means body in Japanese. First we will start with body parts located on your face (kao 顔 ).
(I) eat with my mouth = kuchi de tabemasu (口で食べます)
(My) eyes are blue = me wa ao desu (目は青です)
Itai (痛い) is an adjective that means it hurts.
(My) body hurts = karada ga itai (体が痛い)
(My) head hurts = atama ga itai (頭が痛い)
(My) foot hurts = ashi ga itai (足が痛い)