“There is no abstract art. You must always start with something. Afterward you can remove all traces of reality.” -Pablo Picasso
Imagine learning mathematics without learning the multiplication tables. Imagine learning chemistry without the periodic tables. The same goes for learning drawing. The figures that your sketch are based on an internal coherence. The external progression is an extension of the internal structure. An architect can not build a monument without an inherent structure. A novelist can not create worlds without grammar. Such is the importance of the study of anatomy to an artist of the living forms and even non-living forms.
Anatomy is an universal language. It is the base and the logic to the external celebration. It is the meaning to the movement and the expression. It is the energy in the figure.