Bruh

What is the central nervous system (CNS) and what is it made up of?

Is the body's processing center.

Made up of the brain and spinal cord.***What three structures protect the CNS?

1. Bone

2. Meninges

3. Cerebrospinal fluid***What 2 structures of bone protect the CNS?

1. Cranium

2. Vertebrae***What is the cranium?

The part of the skull that houses the brain - protects the brain specifically.***Locate the cranium.

2. Arachnoid mater

3. Pia mater***Which layer is the dura mater?

The outermost layer.***Describe the structure of the dura mater.

Sticks closely to the bones of the skull, but isn't so fitting on the inside of the vertebral canal.***Which layer is the arachnoid mater?

The middle layer.***Describe the structure of the arachnoid mater.

Has a web-like appearance, and is thin and waterproof.***Which layer is the pia mater?

The inner layer.***Describe the structure of the pia mater.

2. Also circulates in the brain and through a canal in the center of the spinal cord.***Describe the appearance of the cerebrospinal fluid.

Is a clear, watery fluid.

Contains a few cells and some glucose, protein, urea and salts.***How many functions does the cerebrospinal fluid have?

3***What is the 1st function of the cerebrospinal fluid?

It acts as a shock absorber, cushioning any blows or shocks sustained by the CNS.***What is the 2nd function of the cerebrospinal fluid?

Support.

The brain is suspended inside the cranium and floats in the fluid surrounding it.***What is the 3rd function of the cerebrospinal fluid?

Transport.

It takes nutrients to the cells of the brain and spinal cord and carries away their wastes.***Explain the circulation of cerebrospinal fluid that allows it to fulfill its transport function.

It is formed form the blood, and circulates around and through the CNS before eventually re-entering the blood capillaries.***