Really lovely sculpt overall; I hope you won’t mind a few anatomy crits…
The rectus abdominus (“the abs”) show muscle striations that are horizontal; they should be vertical. And there should be a difference in texture (absence of striation) in the tendinous intersections (the connective tissue areas between the muscle compartments of the rectus), and linea alba (the tendinous line down the middle of the rectus). If what you are meaning to show here is the rectus sheath (a connective tissue envelope surrounding the rectus), then its texture is actually diagonally cross striated at about a 45° angle.
The diagonal “strap” of muscle above the knee is something that is unfortunately common in these kinds of ecorché images. It doesn’t exist. It is an anatomical error that has been perpetuated by people copying some well-known examples. At best, there is a thin, diffuse band of connective tissue in that area, but no strap-like muscle, and it is best to remove it. It is not shown in any reputable anatomy book (and hasn’t existed on the cadavers I’ve dissected).
In the facial muscles, procerus (between the eyes, above the nose) is massive; in reality it is a thin sheet like muscle that blends into the surrounding occipitofrontalis. Occipitofrontalis is shown with two distinct muscle bellies on either side; it is usually continuous across the forehead (though some cadavers do show it distinct on either side, but not as extreme as you have shown it).
You show orbicularis oris (the concentric muscle around the mouth) as superficial to all the other muscles around it. In reality many of the muscles (e.g. zygomaticus major, depressor anguli oris) actually insert superficial to the orbicularis oris, or along its edge.
Hope this helps; it really is a beautiful sculpt otherwise!