Which of the following systems is associated with electrical communication?

The nervous system is fundamentally responsible for electrical communication within the body. It is composed of neurons, which are specialized cells that transmit information through electrical signals known as action potentials. These signals travel along the axons of neurons and facilitate communication between different parts of the body, allowing for responses to stimuli, coordination of movement, and processing of sensory information.

In addition to neurons, the nervous system includes glial cells that support and protect neurons, and synapses, which are junctions where neurons communicate with each other using neurotransmitters. This system operates quickly and allows for rapid responses, which is essential for functions like reflexes and the regulation of internal processes.

In contrast, the other systems listed do not primarily rely on electrical communication. The digestive system is responsible for processing food and absorbing nutrients, but it mainly relies on chemical signals and mechanical actions. The lymphatic system is involved in maintaining fluid balance and immune functions, and it also relies on biochemical processes. The urinary system functions to remove waste products from the body, primarily using filtration and absorption processes rather than electrical signaling. Thus, the nervous system's unique ability to use electrical impulses for communication distinguishes it as the correct answer.