Bones:

* Skull: The skull is the bony structure that encases the brain, providing protection from external forces.

Membranes (Meninges):

* Dura mater: The outermost, tough membrane that lines the inside of the skull.

* Arachnoid mater: A delicate, web-like membrane that lies beneath the dura mater.

* Pia mater: The innermost membrane that directly adheres to the surface of the brain.

Fluids:

* Cerebrospinal fluid (CSF): A clear fluid that circulates around the brain and spinal cord, providing cushioning and protection.

Other structures:

* Cranial nerves: Twelve pairs of nerves that emerge from the brain and connect to various parts of the body, controlling sensory and motor functions.

* Blood vessels: Arteries and veins that supply the brain with oxygen and nutrients and remove waste products.

These structures work together to protect and support the brain, ensuring its proper functioning.