Page 8,9- Structures protecting the CNS

Question 1

Bone

Answer 1

Outermost protection for brain and spinal cord
Brain is contained within the cranium while the spinal cord is protected by the vertebrae.

Question 2

What are the Meninges

Answer 2

Three membranous structures that exist between the CNS and bone surrounding it.

Question 3

Meninges Outer Layer

Answer 3

Tough and fibrous, sticks closely to the inside of the cranium.

Question 4

Meninges Middle Layer

Answer 4

Mesh-like layer which acts to cushion the CNS.

Question 5

Meninges Inner Layer

Answer 5

A thin and delicate layer composed of many blood vessels and fitting closely to the brain and spinal cord.

Question 6

Cerebrospinal fluid (CSF)
andwhat it occupies

Answer 6

A clear fluid containing organic molecules and some salts produced from blood.
occupies the space between the inner and middle meningeal layers, cavities within the brain tissues and the central canal of the spinal cord.

Question 7

Cerebrospinal fluid main functions

Answer 7

-Shock absorbance
-Suspension of the brain within its cavity thereby supporting it.
-Transporting nutrients from the blood to the CNS, and removing waste from the CNS as it returns to the bloodstream.