Ossicles
Star fishes, brittle stars and sea urchins are echinoderms. The term echinoderm translates to 'spiny skin'
The term "ossicle" means "little bone".It is generally used to refer to the auditory ossicles of the middle ear.It can also refer to:small bones that were formed in addition to the normal bones as in the ankle.pieces of bone fragments common in the knee areaboney plates of the endoskeleton of echinoderms
An inside skeleton is called an "endoskeleton" in contrast to the term "exoskeleton" which is used to describe a "skeleton" that is on the outside.
The medical term for the outside of the skeleton is "periosteum". It is a dense layer of connective tissue that covers and protects bones.
The term echodermis is referring to a person's skin. This is the scientific name and definition for this term. It is used often in Science and other professions.
Plates are usually round and used for serving food.
endoskeleton
The Spanish term "esqueleto" means "skeleton."
The term describes a group of genetic disease characterized progressive weakness and degeneration of the skeleton is called muscular dystrophy.
"plates" are the term for the giant sheets of rock on the earths crust
Fossil
fault lines