Ashleysparling- The body is all one mesh but it has poly groups to make sculpting easier. With poly groups you can hide sections of the mesh making it easier work around tight areas or make rotating around a hand much easier than having a whole body in the canvas. I'm not sure if you know about poly groups so I put this together for you explaining how to create them, hope it helps.
1. Holding Ctrl + Shift left Mouse click and drag a marque selection over a section of your mesh. This will create a green selection box. What ever is in the green box will be visible.
2. Now you will have only the portion of the mesh you selected visible. This does not delete the rest of your mesh it just hides it.
3. If you have some faces that you want to hide; holding Ctrl + Shift lft Mouse click and drag a marque selection over those faces and release the Shift key. This will create a Red marque box. This will hide the selection. Release mouse click.
4. Click on the Poly group Tab in the Tool menu. Now click the Group Visible button. This will place that selection into a poly group, Poly groups will have a color applied to them. You can only see the colors in Cage mode.
5. To view the whole mesh; Holding Ctrl + Shift lft Mouse click in the open canvas. Now you can see that the right leg is in a poly group. To view this poly group Hold Ctrl + Shift lft Mouse
click on the right leg. I usually separate the body into several poly groups, each leg, arm, hand, the head and torso.