Magnetic field lines of current carrying conductor follow property ?

[Samvid]

The lines of flux of the magnet possesses the following properties:
1)Forms closed loop
2)Starts from N-pole and closes at S-pole
3)Do not intersect each other
4)Parallel line and same direction repels each other
5)Parallel line and opposite direction attract each other

So this are the main properties and now my question is

-----> The magnetic field lines of current carrying conductor of the does the follow all the properties of it?
Because where is the north pole and south pole in the conductor?
Why they are round?

 

[Vailanor]

The magnetic field lines of a current carrying conductor do not necessarily follow all the properties of a magnet. The main difference is that the north and south pole of the magnet are fixed, while in a conductor the direction of the magnetic field lines depends on the direction of the electric current. Therefore, the magnetic field lines produced by a current-carrying conductor are not necessarily closed loops and they can intersect. Additionally, the magnetic field lines will not always form round shapes; they can be linear depending on the shape of the conductor.