Mar 18, 2016. There are 11 major organ systems in our body. This includes the circulatory, respiratory, digestive, excretory, nervous, and endocrine systems. As well as the immune, skeletal, reproductive, muscle and integumentary systems.
Dental crowns can be made up of all different sorts of materials -- porcelain or a combination of porcelain with metal. The type that's chosen not only depends on where the tooth is situated, but what the condition of the tooth is (how discolored it is and how decayed it is), as well as the condition of the gums.
History of Crowns - Origin and Symbolism of Crown. Crown is a symbolic headgear that is worn by monarch. Crown represents power, glory, immortality, royalty and sovereignty. It is often made from precious metals and decorated with jewels. Having a special headgear that will designate a ruler exist in many civilizations around the world.