Importance of the Number '7'

'7' is the number which has its great importance in itself.We all are surrounded by basic '7' all around.Some of them are listed below:-

7 Days of the Week
7 Deadly Sins
7 Continents
7 Chakras
7 Body Orifices
7 Colors in a rainbow
7 notes in a music scale
7 major metals
7 phases of the moon
7 natural divisions of the brain
7 functions of the nervous system
7 compartments of the heart
7 major body organs
7 year itch
7th inning streatch
7th heaven
7 virtues
7 layers of the OSI model (computer-related)