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Harbour Bridge - Sydney - Australia

The Harbour Bridge is a steel arch bridge that allows trains, cars and pedestrians to cross the Sydney Harbour. With the Opera House, the Harbour Bridge is an icon of both the city Sydney and Australia.

Pink Flamingo - Galápagos - Ecuador

These birds with long and curved necks, are the only birds to be tall and pink. They are found not only in the Galápagos Islands, but also on some islands in Central America and some parts of Africa and Asia.

Kylemore Abbey - Connemara - Ireland

This Neo-Gothic castle is located in the region of Connemara. It was built by Henry Mitchell who later offered it to his wife. Today the monastery became a school for girls and is run by nuns.

Zambezi River - Zimbabwe

The Zambezi River has its origins in the low-lying floodplains where Zambia, Zaire and Angola meet, an area from which water flows both northwest into the Congo system and the Atlantic, and southwest into the Zambezi system and the Indian Ocean.

Gum

Gum is the pink soft tissue in the mouth that surrounds the teeth and covers the maxillary bone. The gingiva's fibres serve as part of the support structure that holds the teeth in place. Gum also protects the teeth from microbial infection at its junction with the tooth.

Healthy gums are firm, pink, and do not bleed easily. If micro-organisms build up around a tooth, a substance called plaque can form and damage the gum. Careful, regular brushing and flossing are needed to avoid gingivitis (inflammation of the gums) or more advanced stage of gum disease called periodontitis.

Dental Anatomy

References

Naudin C., Grumbach N., Larousse Médical, 3ième édition, Paris, 2003.
Marcovitch H., Black's Medical Dictionary, 41st edition, London, 2005.
Leikin J. B., Lipsky M. S., Complete Medical Encyclopedia, First edition, New York, 2003.
Wikipedia, the free encyclopedia (www.wikipedia.org).
Last update: 25th of November 2007.