A three-part image shows the structure of the nerve, common structure of a neuron or nerve cell, and the micrograph of a neuron. A neuron structure shows three basic parts; the cell body, dendrites, and an axon. The cell body has a nucleus at the center. The dendrites project from the cell body as small branched fibers. The axon projects from the cell body. The connecting region between the cell body and axon is labeled axon hillock. The axon is a thin fiber-like structure covered by myelin sheath. The myelin sheath is separated between the axons by node of Ranvier and includes neurolemma of Schwann cell. The end of the axon is labeled axon terminal, which shows small branched fibers with synaptic end bulb at the tips. The micrograph of the nerve shows a cell body with small round nucleus at the center. The structure of the nerve shows the interior regions of the spinal nerve. The outer layer of the nerve is labeled epineurium. The inner layer shows bundles of perineurium, which includes endoneurium in bundles. Each Endoneurium contains an axon inside it. Associated text reads; Nerves are bundles containing hundreds to thousands of axons, part of the basic neural cell, the neuron. Text at the bottom of the screen reads; Functions, 1. Cell bodies and dendrites receive input information. 2. The axon conducts nerve impulses toward another neuron, a muscle cell, or a gland cell. 3. Synaptic vesicles contained in synaptic end bulbs contain neurotransmitters which, when released, promote communication from one neuron to another cell