I'm gonna go with the brain on this one.
The brain.
The skull protects the brain.
It is not an organ system. Bones are not organs. It does help protect some organs, like the brain being inside the skull, but it is not part of an organ system.
The brain is on the inside the skull.
There is no organ that shares it protection between the skull and ribcage. The skull protects the brain mainly and hte ribcage protects the heart and lungs.
the skull protects your brain.
If you are a human, then your brain is inside your cranium, or skull.
if u mean internal organs in the skull, its the brain
the brain
The skull protects and supports the brain/brain membranes, and the sense organs.
The skull is actually several large, flat bones that are connected by sutures (an immovable synarthritic joint). The occipital bone makes up the rear part of the skull (the back of the head). The temporal bone forms the sides of the skull and protects the structures of the inner ear. The parietal bone has a left and right hemisphere -- like the brain -- and connects to the frontal bone (the forehead). If you want to know the scientific name for "skull," it's Cranium.
skull, ribs, and bones
Your Head.