This is fascinating.
3D anatomy programs are nice, but when it comes to studying the human body
there is nothing that comes close to an actual dissection.
Update: another fantastic resource are the following videos
Head and Neck
Head and Neck Part 2
Internal Organs & Reproductive System
This channel has a lot of anatomy dissection videos.
Here for example is a dissection of the shoulder.
See what rotator cuffs, triceps, deltoids, pecs minor /major look like in reality.
Further looking at the biceps, nerves and arteries.
Also check out the wrist and forearm videos.
That reminded me of a visit to the Body Worlds Exhibition a couple of years back. Highly recommend it seeing it when you have the chance.