skeleton
The body structure also known as the cranium is commonly referred to as the skull. It is the bony structure that encloses and protects the brain.
scales
Yes. That would be what you call your chest.
Corpse, cadaver, human remains.
The biggest bones in the human body are the femurs which are located in the thigh.You could also call them the thighbones.
Eye socket
they have a version that are bony and harder call squiets
The brain.
The vitreous humour can be found in a human eye. It is the clear gel between the lens and the retina of a human eyeball. It is sometimes call the vitreous body.
Corpse, cadaver, human remains.
Siren
In some regions, "naughty body" rhymes.