If you have the time to do one bodypart everyday then why not? you can concentrate on giving it a hard session then. Only thing is as muscles like the bicep are a relatively small muscle I find less is more, I only do two exercises for bicep one for size eg. curls and one shaping eg. preacher curls. I currently do chest and back one day, shoulders, biceps and tri-ceps another day and finally my legs a seperate day. I like to keep tri-cep seperate from chest as it takes a hammering during benching anyway. Ho pe this helps