What does nervous tissue primarily consist of?

Nervous tissue mainly comprises neurons, which are specialized cells responsible for transmitting and processing signals throughout the body. These neurons have unique structures, including dendrites for receiving inputs, a cell body for processing information, and axons for sending signals to other neurons, muscles, or glands. This primary function of neurons is critical for the coordination of bodily functions, sensory perception, and response to stimuli.

Supporting cells, known as glial cells or neuroglia, also play essential roles in nervous tissue. They provide support, protection, and insulation to neurons, although they do not participate in signal transmission. The presence of these cells enables neurons to function more efficiently and maintain the overall health of the nervous system. Thus, the defining characteristic of nervous tissue is its composition of neurons that facilitate communication within the body, making the correct answer clearly aligned with the fundamental nature of this type of tissue.