Things

HEAD

Ears
-Cochlear implant
-en.wikipedia.org/wiki/Cochlear_implant
-
-Direct acoustic cochlear implant
-en.wikipedia.org/wiki/Direct_acoustic_cochlear_implant

Eyes
-Retinal Implants
-en.wikipedia.org/wiki/Retinal_implant
-
-Argus retinal prosthesis
-en.wikipedia.org/wiki/Argus_retinal_prosthesis

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SPINE

Spine
-Polymer sponge
-en.wikipedia.org/wiki/Polymer_sponge