What does nervous tissue primarily consist of?

Nervous tissue primarily consists of one large cell with branches, which refers to neurons. Neurons are specialized cells responsible for transmitting information throughout the body via electrical impulses. The structure of a neuron includes a cell body (soma) and long extensions called axons and dendrites that facilitate communication between nerve cells. Dendrites receive signals from other neurons, while the axon transmits signals away from the neuron, allowing for complex networks of communication essential for all bodily functions.

The distinctions in other options highlight the unique characteristics of nervous tissue. Small interconnected cells might suggest glial cells, which support neurons but are not the primary functional units of nervous tissue. Circular structures lined up could hint at a different type of tissue arrangement, such as that found in certain epithelial tissues rather than nervous tissue. Layered flat cells are typical of epithelial tissues, which cover surfaces and line cavities. Thus, neurons with their branching structure are fundamental to the organization and function of nervous tissue.