figure

this image of s skeleton has some good proportion  body is right height and width, the we can see the curve of the spine. some areas which need improving is shading as there is a lack of shading within this image, also detail needs to be added to the skull as this moment its just an outline of a skull.   

this is a study of a skull, the skull has some good form and shape, its easily identifiable the skull is in proportion and we have some nice added detail on the skull with the cracks on the top of the skull. some areas which require improvement are the eye sockets  as the shape and hight are off slightly this areas does need some improvement although the space between the eyes are right distance. some shading is require on the teeth, one area which should be done next time if the artist wishes to draw another skull is have a different perspective as the skull is just straightforward and looks very flat next time go for a more 3D perspective   

this skeleton has some nice bit of detail on the skull for example the outline and also the detail such as the jawline and teeth. some shading has been used here as well, some of the ribs on the chest have lighter values than others as well.