Homeostasis can be defined as the process by which the body of a person maintains the steady internal conditions. This control system is composed of the three parts, namely the receptor, control center, and the effector. The very first part is the receptor, which is composed of the sensory nerves and it detects the changes occurring in the body. This change is known as the stimulus. The information about the stimulus is transferred to the control center via the sensory nerves. It initiates the changes in the body through the effector. It brings changes in order to alter the stimulus.
Hence, the blanks can be filled with ' receptor, sensory nerves, stimulus,control center, effector and stimulus' respectively.