Well, just think of the helmet you wear when you go biking. A helmet protects your head from getting hurt as bad as it would if you wore no helmet. Also, for the second part, also think of the poles used to keep a tent up and in its shape.
A skull does just that. Your skull is thick, because your brain is one of the important organs in your body. Without your brain, well, you can't move, talk or do about anything. Your skull protects your brain, oh, and it also keeps the fluid in. And your skull also gives you your roundish head shape. also it makes crashing into things less painful.
Your brain is soft, if you had no skull, and you touched your head, it be like touching jelly, you know how a jelly is soft and gooey, right? Well, for the graphics here, your brain is just like that, except more wet.
to protect the brain...
You can not see your brain as it is enclosed by the skull.
To protect it from damage.
Because you live much longer when the brain is shielded from damage.
The brain is soft tissue enclosed in hard bone, the skull. When the head is hit with force, it cuases the brain to hit the skull causing a "bruise' or concussion.
Unless you're half way through open brain surgery - no. Your skull is still an enclosed cavity and won't let your brain escape regardless of speed.
Sinus.
The brain
Because there is no-where for the extra swelling to go - since the brain is completely enclosed by a solid skull, any swelling of the tissue causes an increase in the pressure of the surrounding fluid, which causes damage to the brain.
the skull protects your brain.
The skull protects the brain.
The brain is on the inside the skull.
all of them, the brain is inside the skull