a] How is brain protected from injury and shock?
b] Name two main parts of hind brain and state the functions of each.

Explanation

a] i] Brain has a three layered membrane called meninges.
ii] In between the layers of meninges and brain, a fluid named Cerebro Spinal Fluid (CSF] is filled which acts as a shock absorber.
iii] The [cranium] hard skull covers the meninges.
b] Two main parts of hind-brain are - Medulla obiongata and cerebellum.
Medulla:
It is responsible for involuntary actions such as blood pressure, salivation and vomiting.
Cerebeilum:
It is responsible for precision of voluntary actions and maintaining the posture and balance of the body.