Closed loop control[r]: A control system in which the controller has access to signals containing information about the current state of the plant (the object or system to be controlled) during the time that the controller is in operation. [e]
Graph theory[r]: Field of mathematics studying graphs, which consist of nodes and arcs joining the nodes. [e]
Autonomic nervous system[r]: Neurones that are not under conscious control, comprising two antagonistic components, the sympathetic and parasympathetic nervous systems. [e]
Peripheral nervous system[r]: The part of the nervous system consisting of the nerves and neurons that reside or extend outside the central nervous system (the brain and spinal cord) to serve the limbs and organs. [e]
Network topology[r]: Defines the method in which a computer network is architected; topologies can be either physical (meaning how the actual hardware is interconnected) or logical (meaning how that network is implemented by protocols in software) [e]
Cytokines[r]: The chemical messengers of the immune system, primarily but not exclusively carried in blood[e]