Which tissue type is involved in transmitting signals throughout the body?

Nervous tissue is the correct choice because it is specifically designed to transmit signals throughout the body. This tissue consists of neurons, which are specialized cells capable of conducting electrical impulses, and glial cells, which support and protect neurons. Neurons communicate information between different parts of the body by sending and receiving messages in the form of electrical signals. This process is essential for coordinating bodily functions, including reflexes, muscle contractions, and sensory perceptions.

In contrast, other tissue types serve different functions. Epithelial tissue primarily acts as a protective layer covering surfaces and forming glands, while muscle tissue is responsible for movement, either voluntary or involuntary. Connective tissue primarily supports and binds other tissues and organs within the body, serving functions such as nutrient transport, insulation, and structural integrity. Therefore, while all these tissue types play vital roles, nervous tissue is fundamentally focused on signal transmission.