Human brain is main coordinating centre of the body, which enables an organism to think and take decisions.
Functions of different parts of brain are:
Medulla oblongata It controls involuntary actions and regulates reflex responses. It also controls blood pressure, salivation and vomiting.
Cerebellum It controls and coordinates different muscular actions. It is responsible for voluntary actions and maintains equilibrium of the body during walking, drinking, catching, etc.
Forebrain It has following parts:
Cerebrum performs thinking, reasoning, speech, intelligence and usage of information.
Olfactory lobes are responsible for detecting smell from different receptors.
Diencephalon controls body temperature, urge of eating, drinking, etc.