A stumuli is an object that can help something to express a feeling
External, meaning outside. Thus, Outside(External) Skeleton.
more external, most external
the reproduction of frogs are external fertilization. By Crystal
external fertilization is external
Is a salmon internal or external?
internal external not internal external not
A crab has an external hard shell, and is an invertebrate.
The external carotid artery.
external
its internal
No, worms are not external.