The hind-brain of the human brain consists of the cerebellum, pons, and medulla oblongata. Among these, the medulla oblongata controls involuntary actions such as blood pressure, heart rate, salivation and breathing, ensuring vital bodily functions continue automatically without conscious effort. It acts as a regulatory center for essential life processes, coordinating signals between the brain and spinal cord. The cerebellum mainly controls balance and coordination, while the pons assists in communication within the brain.