What are nerve cells?

Answer 1

The Peripheral Nervous system (PNS) includes all the neural tissue outside the Central Nervous system (CNS). The PNS delivers sensory information to the CNS and carries motor commands to peripheral tissues and systems. Bundles of axons, or nerve fibers, carry the sensory information and motor commands in the PNS. Such bundles, with associated blood vessels and connective tissue, are called peripheral nerves, or simply nerves.

A whitish cord-like structure composed of one or more bundles (fascicles) of myelinated or unmyelinated nerve fibers, or more often mixtures of both, coursing outside the central nervous system, together with connective tissue within the fascicle and around the neurolemma of individual nerve fibers (endoneurium), around each fascicle (perineurium), and around the entire nerve and its nourishing blood vessels (epineurium), by which stimuli are transmitted from the central nervous system to a part of the body or the reverse. Nerve branches are given in the definition of the major nerve; many are also listed and defined under branch.

Answer 2

Nerve cells are specialized cells for neuron function by bio chemical ion diffusion to transmit electrical impulses as information from neural cortices to muscles/organs for coordination of body function.

Answer 3

Nervous system is categorized into two system which is the central nervous system and peripheral nervous system. Central nervous system consist of brain and spinal cord. Any nerve that is apart from this two structure is considered as peripheral nervous system.

Answer 4

A cranial nerve is a nerve that passes through various foramina in the bones of the cranium and arise from the brain inside the cranial cavity.