Pondering Exoskeletons

Found myself contemplating exoskeletons on the way home from work today. No idea what brought it on. Exoskeletons are weird though, don't you think? How do the joints work? Is it really bone or more like fingernail? Is it alive like our bones with blood and stuff...can't be, right? Are there completely no bones on the inside of the body then? What do the muscles bond to? How do they move? ...There are muscles, right? If you break your exoskeleton do your insides all just come out? Is it pressurized at all in there? How do you get air in to breathe without being able to expand and contract? What happens where joints are...like is there exposed...exposed...I dunno, like is there skin or something under where the joints are or just exposed muscle, or what? If you don't have skin does that mean that you never get an itch? I wouldn't think an exoskeleton could itch. It probably doesn't have any nerve endings. ....how do they know when they're touching something if there are no nerve ending on the outside? Does the pressure from touching it transfer to the inside where there are nerve endings? They must have nerve endings somewhere in the body, right? Maybe not. hmm. Apparently I need a book about this. How can bees be hairy if they have exoskeletons? Does the hair grow right out of the bone or whatever it is?