Facts about Human Nervous System
Below are the sample amazing and interesting facts about the human nervous system:
The development of neuron cells usually decrease with the age, at the time of fetus development in the womb the rate is 250000 neurons per minute though this decreases to almost zero in adult. At birth the kid will have around 10 million nerve cells.
Number of cells
An adult human will have like 10 billion neuron cell. They are unlimited number in the human brain, from the estimate they are said to be more than the stars in the milky way.
Speed of the nervous system
Since the system is used to help the body to detect changes in the surrounding it has to be very fast in the transmission of signals. The impulse are propelled at a speed of 100 meters per second. The message from the organ to brain is 80 miles per hour.
The spinal cord
The human spinal cord consists of about 13,500,000 neurons.
Control in contrast
The brain being divided to two hemisphere, the right and the left, it works in a way that the right part controls the left side of the body while the right part controls the right side.
Weight of the brain
The weight varies with sex, in males it’s about 1375 g while in the female counterpart is 1275 g in the course of growth 1 g is lost yearly.
Active and largest cells
Of all the cells in the brain 4% are active, 965 in resting phase as reserve cells. Neurons are the largest cells in human body , yet being cells they does not cell division by mitosis.