The basic V3 doesn't include any actual morphs, though it does include "spaces" (called chanels) where the data can be put. Injecting a morph adds a set of shape adjustments to the particular channel reserved for it. You can also remove the data, if you've loaded a morph and then decided not to use it. Because morphs specify a shift in position for each point of the body part they affect they can use up a lot of memory - this method means you aren't wasting it on stuff you haven't used.