If you don't know yet...It will come to you...It's different for everyone...
Internal and external? 4real
External structure is a term used to describe a certain type of asset. An external structure is a relationship that you must rely on that is outside of your own organization.
A structure outside. A skeleton of an object.
skin
It has a hole in it is a rounded shape.
An Internal Structure is the way an organism looks on the outside and an External Structure is the looks on the outside.
a tailbone
cytoskeleton
The external sac-like structure of the male reproductive system is called the testes which reside in the scrotum.
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No, it is not you can live your life just fine without knowing what it is.
The external structures of animals protect the animal from harm to internal organs. An example of an external structure is the skin and fur on a bear. The skin protects the internal organs, and the fur protects the skin.