"internal" means "inside".
internal
a lot of money
A lot. Dogs, Cats. Almost all animals have lungs.
Internal bleeding.
depends on which kind!
bachelor degree
A prokaryotic cell.
optical
A cheetah has an endoskeleton, which is an internal skeleton.
The cat ate the rat He felt bad but was kind of glad Couplet with internal rhymes
a lot
a lot of bandages and being taken to the medics