z chromosomezoster immune globulinzonula ciliaris (aligament in the eye holding the lens in place.zygomatic bone in your face(pair)zygomaticus Major and minor ( they are groups of muscles around your mouth)Those are some body parts that start with z!
What happened to my own arm and shoulder was that I suffered a rotator cuff tear in my right shoulder, years ago, which still bothers me when trying to lift heavy objects or if I should twist my arm in some way. I was offered surgery at the time but decided the trauma of surgery was less desirable than coping with the rotator cuff tear. I was wrong. If you should encounter such an accident, by all means have the surgery if you're sufficiently well to undergo it.