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.
very little myelin. Site of the neuron cell bodies, dendrites, and synapses. It forms a surface layer called the cortex over the cerebrum and cerebellum, and deeper masses called nuclei surrounded by white matter.bright, pearly white color stemming from the myelin around its nerve fibers. It is composed of tracts, or bundles of axons, which here connect one part of the brain to another and to the spinal cord. Deep to cortex.hite matter. bright, pearly white color stemming from the myelin around its nerve fibers. It is composed of tracts, or bundles of axons, which here connect one part of the brain to another and to the spinal cord.