Final answer:
Nerves are composed of multiple layers of connective tissue that provide structure and support, including the epineurium, perineurium, and endoneurium.
Step-by-step explanation:
Nerves in the body are composed of connective tissues that provide structure and support, as well as blood vessels for nourishment. The outer layer of a nerve is called the epineurium, which is a fibrous connective tissue that surrounds the entire nerve. Within the nerve, the axons are bundled into groups called fascicles, each of which is wrapped in its own layer of connective tissue called the perineurium. And finally, individual axons are surrounded by the endoneurium, which is a loose connective tissue.