The human nervous system is measured as the most complicated and mysterious system in the body. It is the body’s communication system as it functions by transmitting signals to and from different parts of its body. It is the most important system of the human body. Without the nervous system, no other systems can function accurately. The nervous system is mainly derived from its nerves, which are cylindrical bundles of fibers.
Based on their location, the nervous system is divided into:
- CNS – The Central nervous system — Consist of brain and the spinal cord.
- PNS – The Peripheral nervous system — Consist of the ganglia and the nerves. Altogether, there are 43 pairs of nerves in the peripheral nervous system, out of which 12 pairs of nerves are directly connected with the brain, and rest 31 pairs of nerves are connected to the spinal cord.
The nervous system is composed of the body’s nerve cells. These nerve cells receive and send information through the body’s senses organs, like –
Eye- Vision or sight.
Ear – Sound.
Nose- To smell.
Tongue – To taste.
Skin – To feel the touch.
Let us learn more in detail about the nervous system from the interesting facts given below.
Interesting Facts about the Human Nervous System
Fact – NO – 1
In our central nervous system, there are more than millions of nerve cells, 100 billion neurons in the human brain and about 13,500,000 neurons in the spinal cord.
Fact – NO – 2
The sciatic nerve is the longest and widest single nerve in the human body, which begins from the spine in the lower back and runs through the buttock and down the lower limb till the toe. The sciatic nerve functions by delivering sensation to the skin of the sole, lower leg and the upper surface of the foot.
Fact – NO – 3
Sodium, proteins, Vitamin B and other mineral ions including potassium, magnesium, and calcium ions are equally essential nutrients required for maintaining healthy and proper functioning of our nervous system.
Fact – NO – 4
Nerve damage is usually irreversible and can result in loss of function of any nerves in the body. This is because, the nerve cells do not undergo the process of cell division, and therefore they cannot grow or repair themselves.
Fact – NO – 5
An optic nerve, which is also known as the cranial nerve is the fundamental part of the central nervous system and the largest sensory nerve of the human eye. The structure of eye mainly comprises of millions to billions of optic nerve fibers and are involved in transmitting the visual information from eye to the brain.
The nervous system is the main control system of our body as it is involved in every function, from breathing, generating and receiving responses, in controlling the muscles and sensing heat, cold and lot more. Damage to the nervous system may result in the functioning of other systems. The nervous system is essential to the human body, as it provides the ability to interact with the world.
These were some interesting and amazing facts about the human nervous system. For more facts and information on the nervous system, students can visit our BYJU’S website and also learn by watching interactive video lessons on various biology topics by subscribing to the BYJU’S YouTube Channel.