Nerves vs neurons
Unlike plants and trees the animals have built special systems to respond to the stimuli of the outer environment and make changes inside the body. The very important and immediate changes are carried out with the help of electric signals of the nervous system whereas the long term chemical changes are mediated by the endocrine system. The nervous system includes a central nervous system (CNS) consisting of the brain and the spinal cord, and the peripheral nervous system coursing outside the central nervous system. All the essential sensory information in multicellular animals is detected by sensory cells. This sensory information is passed on to the effector cells generating the response.
The cells between the receptors and effectors are the conductile cells of the nervous system also known as neurons. Neurons are the basic structural and functional units of the nervous system and ramify throughout an organism, developing a well-defined communication network. A neuron consists of a cell body, dendrites and an axon. There are three major kinds of neurons: pseudo unipolar neurons perform a sensory function, bipolar nerve cells situated within the central nervous system transfers the signals either to a motor neuron or to the brain, and the multipolar neuron is a motor neuron responsible for transmitting a response signal on to a muscle or within the central nervous system.
On the counter side nerve is a collection of axons or dendrites wrapped in connective tissue that transmits impulses between the central nervous system and some other essential parts of the body. A normal kind of nerve has a tough outer covering, epineurium. Inside the nerve there are the long fibrous axons or dendrites of individual neurons, gathered into bundles called fascicles, wrapped in the perinurium. Every axon within these bundles is further wrapped by a myelin sheath formed by Schwann cells, to keep the nervous impulses insulated. Most large nerves are mixed nerves, consisting both motor and sensory nerve fibers running to and from a particular region of the body.
What is the difference between Nerves and Neurons?
Nerves are formed from a group of neurons while a neuron is a individual cell.
Nerve transmit information to all parts of the body while neurons conduct nerve impulse .
Nerve damage can cause diseases which affect the movement of different parts of our body e.g Ataxia , carpel tunnel syndrome etc . Neuron damage affects brain health and cause disease such as Parkinson’s and Alzheimer’s.
A nerve is an important collection of axon bundles found in the peripheral nervous system. The axons are wrapped in three layers connective tissue for the protection and insulation. Whereas on the other hand a neuron, has only one axon, it may be branched and extend in more than one direction.
The myelin sheath is present nerves and neurons both. The neurons are single nerve cells whereas nerves are elongated congregations of tissues.
The neurons are found in the central and the peripheral nervous system, but the nerves are only in the peripheral nervous system.
The neurons are grouped according to the amount of extensions that extend from the neuron’s cell body and by the direction that they transmit information. But the nerves are grouped by the place of their origin in the central nervous system or their destination.
The neurons are known to be the oldest cells of the body they can out live a human .