Human brain is formed of a large number of parts like cerebrum, thalamus, hypothalamus, pons, cerebellum and medulla oblongata. Each part performs some specialized function and all the parts are essential for the survival of a person. Discuss the following statements :
(a) Thalami are called relay centres of the brain.
(b) Damage to medulla may cause the death of organism.

Explanation

(a) Thalamus is composed of grey mater which serves as a relay centre for impulses between the spinal cord, brain stem and cerebrum. Within the thalamus, information is sorted and edited and plays a key role in learning and memory. It is a major coordinating centre for sensory and motor signalling.
(b) Medulla contains vital centes that control cardio vascular reflexes and respiration. Hence damage to medulla can cause death of the organism.