The correct option is E Nervous system
The digestive system includes alimentary canal and associated glands to carry out the digestion of food and release the energy stored in these food substances. The respiratory system is responsible for breathing and exchange of respiratory gases while circulatory system serves in exchange of oxygen, nutrients and hormones for carbon dioxide and waste materials. Skeletal system serves in support, protection, RBC production, storage of mineral and fat as well as in locomotion of organisms (in coordination with the muscular system). The nervous system includes centrally located (lie in the midline of the body) central nervous system (brain and spinal cord) and the peripheral nervous system. The peripheral nervous system includes all cranial and spinal nerves. The whole system forms a communication network and serves in the reception of sensory input followed by their integration in the brain and spinal cord and generation of motor output to produce the response. Thus, the correct answer is option E.