It is argued that from the continuum point of view the stress tenser is symmetric, except for a class of suspensions in which torques could be produced on each particle in the carrier fluid by an external field. Statistical theories are shortly reviewed. A new set of macroscopic angular momentum equations is obtained for polar media by considering the order of magnitude of each contribution to the integral angular momentum balance. It is found that couple stresses and microintertia can always be neglected with respect to the contribution of the stress tenser.