Anatomy and Eidonomy
Morphology can be separated into anatomy, which is the form and structure of an organism’s inside and eidonomy, which is the outside shape or features of an organism.
Eidonomy: Outside shape or features of an organism
The taxi continues to morph until it has a cow hide on (eidonomy) the outside.
Anatomy: Inside shape or features of an organism
Only people with a hat on (anatomy) were allowed inside the taxi.
In everyday language anatomy has become a generalisation that covers both anatomy and eidonomy.