Where does this statement come from? New cells are generated, just like at our finger nails but not all new cells. And we don't get a make over every 7 years, that would tattoos wouldn't last etc.
And the number 7 is there. Why every 7 years?
Is there something special about the number 7? Where does the myth of lucky number 7 come from? Is it the 7 days of creation? The number 7 has a special place:
* The minor symbol number of yang from the Taoist yin-yang.
* The number of palms in an Egyptian Sacred Cubit.
* The number of ranks in Mithraism.
* The number seven is of particular significance within Cherokee cosmology.
* In Bah?'?, the mystical text The Seven Valleys, by the Prophet-Founder Bah?'u'll?h, relates the journey of the soul through the seven "valleys" of Search, Love, Knowledge, Unity, Contentment, Wonderment, and finally True Poverty and Absolute Nothingness.
* In Buddhism, Buddha walked 7 steps at his birth.
* Circle Seven Koran, the holy scripture of the Moorish Science Temple of America ?? * In Spanish and other Romance Languages, cats are said to have 7 lives as opposed to English, where cats are said to have 9 lives.
* In Wiccan spirituality the number seven is said to hold a lot of divinity. It is known for being a very sound number and associates with many things.
* The Seven Lucky Gods refer to the seven gods of good fortune in Japanese mythology.
* In Khasi mythology, the seven divine women who were left behind on earth and became the ancestresses of all humankind.
* The number of gateways traversed by Inanna during her descent into the underworld.
* The number of sleeping men in the Christian myth of the "Seven Sleepers." is this not a contradiction with the Quran, I think it refers to it. The part where it goes say not they were three, and their dog was the fourth and so on. Don't remember the exact verse * The Seven Sages in Sumerian mythology[citation needed] and various other mythologies.
* The number of sages in Hindu mythology; their wives are the goddesses referred to as the "Seven Mothers."
* The number of main islands of mythological Atlantis.
* In Guaran? mythology, the number of prominent legendary monsters.
* In Irish Mythology, the epic hero C?chulainn is associated with the number 7. He has 7 fingers on each hand, 7 toes on each foot, and 7 pupils in each eye. In the Irish epic T?in B? C?ailnge, C?chulainn is 7 years old when he receives his first weapons and defeats the armies of the Ulaidh. and his son Connla is 7 years old when he is slain by C?chulainn in "The Death of Aife's Only Son".
* In British Folk lore, every 7 years the Fairy Queen pays a tithe to Hell (or possibly Hel) in the tale of Tam Lin.
* In the British Folk tale of Thomas the Rhymer, he went to live in the faerie kingdom for 7 years.
* The 7th glyph of the Mayan Calendar is Blue Hand,
it represents the days in creation and is associated with creative perfection. This is the glyph of the last day of their calendar that ends on December 21, 2012.
* The seven branched sword in Korean mythology.
http://en.wikipedia.org/wiki/7_%28number%29