The exoskeleton of arthropods is made from a hard protein, chitin. Note that it does not surround each individual organ but forms a cuticle around the entire body.
Arthropods have an internal body cavity called a hemocoel which bathes the internal organs in nutrients, and is a component of their open circulatory system.
Yes Yes it does All insects and arachnids are invertebrates and have exoskeletons.
The arthropod group
No. A millipede is a myriapod, which is a kind of arthropod.
A cheetah has an endoskeleton, which is an internal skeleton.
The boney kind.
internal
This is called an exoskeleton.
a spine?
exoskeleton
anthipod
Exoskeleton.