Fill in the Blanks The nervous system 3: brainOnline version Text to be completed by the student. Unit 1. Natural Science 6 primary by Guillermo Ferrando Valverde 1 cerebrum thinking brain three cerebellum stem cerebellum The brain has parts : the cerebrum , the brain stem and the . The produces voluntary responses . It controls our , memory and language . The controls the organ functions , for example our hertbeat . The controls balance and coordination .