PATHOLOGY

Detailed explanation-1: -The human brain has often been viewed as outstanding among mammalian brains: the most cognitively able, the largest-than-expected from body size, endowed with an overdeveloped cerebral cortex that represents over 80% of brain mass, and purportedly containing 100 billion neurons and 10× more glial cells.

Detailed explanation-2: -The human brain is composed of 80 billion neurons. These nerve cells differ in their form, function, and connectivity with other neurons to form neural networks. This complexity allows the brain to perform its many functions, from controlling speech and vision to storing memories and generating emotions.

Detailed explanation-3: -A neuron is a nerve cell. The brain is made up of approximately 86 billion neurons (Source: Frederico Azevedo et al., Equal numbers of neuronal and nonneuronal cells make the human brain an isometrically scaled-up primate brain.