Jamal,
Because of the new ribbon design, there will not be one-to-one compatible buttons between Desktop and Pro. Esri chose to go with the navigation button, and with the shortcuts on the page Dan Patterson pointed out, those are the options we current have access too. You may be able to expand the window (sometimes widening the page will reveal more of the ribbon) or looking at the down arrow under Explore in the navigation panel (sorry, no access to Pro right now).
You are not the first to ask about the return of the navigation and zoom buttons. Some things will not be able to be ported since Pro was built from the ground up for 64-bit, per user request for 64-bit (and the fact that Desktop had gone about as far as it could get with 64-bit). They went with the ribbon design, and although I'm not a big fan, that is the format that they will be working with in Pro. (That is also one of the reasons, for example, that adding a Python addin toolbar is not as easy as double-clicking the .addin file ...toolboxes are handled differently now).
To see what others have already asked about, and suggested as improvements, here is a connection to all the ideas others have submitted for improvements to Pro ... Look thru those (may give you answers to some of you pending questions on Pro) and vote for ones you would like to see, and submit new ideas if you find things that you would like to see in Pro. http://links.esri.com/arcgis-pro-ideas
Also, another doc to look thru is the FAQ in the Pro help
Frequently asked questions—ArcGIS Pro | ArcGIS for Desktop