Q. Of which cells is the nervous tissue constituted? How is the generic function of this tissue related to the characteristics of the main cell type that forms it?

The nervous tissue is formed of glial cells and neurons.

The function of the nervous tissue is to transmit and to receive neural impulses (transmission and reception of information). This function justifies the characteristic morphology of neurons, with membrane projections dendrites to get information and an elongated membrane projection axon or nerve fiber to transmit information at distance. In their turn, the glial cells support the neurons and facilitate their work sometimes acting as insulators.