The 3D model can be simply manipulated using finger gestures: spread to zoom in; drag two fingers to pan; pinch to zoom out; and drag to rotate.
The slice tool affords the ability to slice through a structure(s) via a 3D plane. The tool becomes accessible when a structure is in Isolate mode.
Turning Systems on/off
There are eleven systems in Essential Anatomy. Clever functionality found within the app allows the user to strip away layers of muscle via the 'layering' tool.