Cerebral Security

To the tune of "Favourite Crime" by Olivia Rodrigo
By the skull the brain is encased
The spinal cord by vertebrae
An interlocking series of bones
There are three outer membranes
Meninges which surround the brain
Dura, arachnoid, and pia mater

There are four ways
That ensure the protection
Of the brain
From injury and infection

CSF will circulate
In the 4 ventricles in the brain
And the spinal column
If a shock is applied
Cushioning this will provide
Minimizing harm to the brain

There are four ways
That ensure the protection
Of the brain
From injury and infection

Blood vessels in the CNS are packed tightly
To prevent large molecules from leaving the bloodstream
This is known as the blood-brain barrier
But it is not equally effective everywhere
There are more permeable areas

There are four ways
That ensure the protection
Of the brain
From injury and infection

And infection
And infection
It provides the protection