Subject: Why some trees have bark or new bark that grows horizontally?

Why does the bark on some trees like cherry or birch go horizontally (on newer 
branches for cherry). Often things are the way they are for a reason. If that's 
the case here, what's the reason?

You see this on newer branches for cherry. On older branches the inner vertical 
bark seems to push through. Also, speaking of cherry, I notice that new branches 
can be dark cherry or copper-red. Is the thing that makes it red the same 
anthocyanin that makes the cherries red?

Re: Why some trees have bark or new bark that grows horizontally?