Answer: the Brainstem which contains ; mid brain, pons , and medulla oblongata.
structure inn the attachment.
Explanation:
Brain stem is the posterior part of the brain continuous with the spinal cord. It makes up 2.6 %of the brain total weight.
It provides motor and sensory nerve supply to the face and neck through the cranial nerves iii-xii
It conducts the transmission of sensory information from the rest of the body to the cerebrum and cerebellum and back to the body for effective response
It integrates the functions of cardiovascular system control. Respiration, pain sensitivity, control alertness, awareness.