What is a nerve composed of?

A nerve is indeed composed of a bundle of neurons and small blood vessels. Neurons are the functional units of the nervous system responsible for transmitting signals throughout the body, and they are organized into bundles called fascicles, which together form a nerve. The inclusion of small blood vessels is crucial as they supply the necessary nutrients and oxygen to the neurons while also removing waste products, thereby maintaining their function.

The structure of a nerve illustrates the importance of both the neurons and the supporting vascular tissue in facilitating the proper functioning of the nervous system. This is vital because a nerve's ability to convey signals effectively depends not only on the neurons themselves but also on the adequate provision of resources through the blood supply. This integrated structure allows the nervous system to operate efficiently in both receiving sensory information and coordinating motor responses.