How many cells are estimated to be in the human brain?

The human brain is estimated to contain approximately 86 billion neurons, and when factoring in glial cells and other types of cells, the total cell count can reach around 100 billion. The choice indicating 10 thousand million reflects a numerical value equivalent to 10 billion, but in more precise scientific terms, this figure is likely underestimating the actual total count of brain cells. Thus, this answer aligns with the substantial estimate provided in neuroscience research, which places the total amount of cells in the brain at a level significantly higher than what the other options suggest. The 10 thousand million figure represents a broad estimation that correlates with the scientific understanding of the human brain's vast and complex neural architecture.