Human Organism System

Forebrain is the largest part of the brain. It consists of three main parts, I. e., cerebrum, thalamus and hypothalamus. Cerebrum is the topmost and the largest part of the brain. It is divided into right and left cerebral hemispheres.

Cerebrm controls many action like thinking, feeling, emotions, hearing, perceptions, memory, speech, decision making, etc. Inside cerebrum there is small structure called thalamus. It controls many sensory functions. Hypothalamus lies at the base of thalamus. It controls body temperature, hunger and thirst.

Hindbrain consist of three parts, I. e., cerebellum pons and medulla oblaganta. Cerebellum lies under the back part of the cerebrum. It acts as a controller for maintaining the body balance and making precise and accurate movements. Pons is an oval structure present beneath the midbrain. It controls many functions like sleep,swallowing, equilibrium, and taste, etc. Medulla oblaganta controls heartbeat, breathing and digestion, etc. Medulla oblaganta also keeps on working when the rest of the brain goes to sleep.