NEET PG DENTAL EXAM

Detailed explanation-1: -Brain, spinal cord and nerves are composed of nervous tissue. The cells of this tissue are called nerve cells or neurons.

Detailed explanation-2: -For half a century, neuroscientists thought the human brain contained 100 billion nerve cells. But when neuroscientist Suzana Herculano-Houzel devised a new way to count brain cells, she came up with a different number-86 billion.