All neurons have a cell body and one or more fibres. These fibres vary in length from microscopic to over 1 metre. There are two different kinds of nerve fibres: fibres that carry information towards the cell body, called dendrites, and fibres that carry information away from it, called axons.
The flute has also always been an essential part of Indian culture and mythology, and the cross flute believed by several accounts to originate in India as Indian literature from 1500 BCE has made vague references to the cross flute. Acoustics
It is not certain how or when the first musical instrument was invented, however, most historians point to early flutes made from animal bones that are at least 37,000 years old. Below you will find the stories behind several popular musical instruments. Michael Blann/ Iconica/ Getty Images.