The human brain contains approximately 86 billion neurons, the primary cells responsible for processing and transmitting information. In addition to neurons, there are also glial cells, which support and protect neurons. Estimates suggest that there are about 1-5 times as many glial cells as neurons, bringing the total number of cells in the brain to roughly 100 billion or more.
Neurons are crucial for communication within the brain and the entire nervous system, forming complex networks that allow us to think, remember, and interact with our environment. Glial cells, on the other hand, play essential roles in supporting the health of neurons, maintaining homeostasis, and providing insulation.
Understanding the sheer number of cells in the brain highlights the complexity of our nervous system and underscores the incredible capabilities of human cognition.