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Starting with the human brain, Pie emphasizes its distinctive features. A standard human brain is marked by its convoluted surface, characterized by numerous bumps and folds—known as convolutions. These irregularities are not merely aesthetic; they are essential to brain functionality, fostering neural connections critical for various cognitive and physical processes.
The surface of the human brain, as noted by Pie, also exhibits fine veins. When an infant is born, the softness of their skull bones allows the brain to shape itself according to the internal pressures exerted. This results in the intricate details visible in human brain casts.