Interesting Facts about Nervous System
When we accidentally touch burning charcoal, the nerves connecting
to our skin transmit the message of pain to the brain. The brain in
response orders the muscles to pull away from the burning charcoal.
This whole process is executed in less than a fraction of a second,
that's even much lesser time than what you would take to read these
two lines. Such is the speed of co-ordination between the brain and
other parts of the body, which is facilitated by the nervous system.
Here are some more fascinating nervous system facts.
- There are millions of nerve cells in the human body. This
number even exceeds the number of stars in the Milky Way.
- The human brain alone consists of about a 100 billion neurons.
If all these neurons were to be lined up, it would form a 600
mile long line.
- In humans, the right side of the brain controls the left side
of the body, while the left side of the brain controls the right side.
- The diameter of the neurons can range between 4 to 100 microns.
- In a child developing inside the womb, neurons grow at the
rate of 250,000 neurons per minute.
- By the time of its birth, the baby's brains consists of around
10 million nerve cells.
- The human spinal chord consists of around 13,500,000 neurons.
The cluster of nerves located at the base of the spinal chord
are most sensitive.
- The weight of the brain in average adult males is 1375 grams,
while in females it is 1275 grams.
- And as we grow older the brain loses a gram each year.
- At a given point of time, only four percent of the cells in
the brain are active, the rest are kept in reserve.
- Neurons, which are the largest cells in the human body, do not
undergo the process of mitosis.
- The nervous system is very quick, it can transmit impulses at
a tremendous speed of 100 meters per second. The speed of
message transmission to the brain can be as high as 180 miles per hour.
- Sodium ions and potassium are necessary constituents to ensure
proper functioning of the nervous system. Even Vitamin B is
considered to be beneficial for it
- There are 43 different pairs nerves which connect the central
nervous system to every part of our body. Twelve of these nerve
pairs are connected to the brain, while the remaining 31 are
connected to the spinal chord.
As the nervous system is one of the most important aspect of the
human body, any damage caused to it often leads to permanent
impairment. Very often, it is noticed that complications such as
paralysis arise when any kind of damage is caused to the head
(brain) or spinal chord.