The Number Of Cells In The Human Brain Cannot Be Counted In One Lifetime
The brain has a vast number of cells. Scientists estimate that it would take over 3000 years to be fully counted. An average adult human brain contains about a hundred billion neurons. The brain also has just as much glia or even more.
Neurons are more famous than glia, but they are both critical for the brain to function correctly. Neurons are excitable cells, while glia support cells with many functions.