Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship--except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of their country of origin.
The brain is made up of over 100 billion nerve cells with each brain cell connected to around 10,000 other cells, which equals around 1000 trillion connections in your brain. Your brain is actually very soft, jelly-like, and not grey but a deep red in color. The brain controls both involuntary, or lower, actions, such as heart rate, respiration, and digestion. Complex, or higher, mental activity, such as thought, reason, and abstraction, is consciously controlled.
Images of the right and left hemispheres of the brain, as viewed from the side. The colors represent the differences in cortical thickness between the high-risk group, which has a family history of depression, and the low-risk group, which has no known risk.Blue and purple represent the thinning of the cortex, with purple regions having the greatest thinning.cientists who have been following families with a history of depression have found structural differences in family membersâ brains â specifically, a significant thinning of the right cortex, the brainâs outermost surface.