Opal is considered the birthstone for people born in October. Famous opals. The Olympic Australis, the world's largest and most valuable gem opal [citation needed], found in Coober Pedy; The Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal
1 Carbohydrates â are required for energy. 2  Glucose, which is a monosaccharide, is the most essential source of energy in the body. 3  The brain works entirely on glucose alone. 4  When an immediate source of energy is required, glucose is converted into glycogen which is stored in the liver.
Starch is the major plant polysaccharide that is readily digested in the intestine and thus serves as a source of carbohydrates. In human body, carbohydrates support the immune system and assist processes such as growth and blood clotting. Their primary role, however, is to supply energy to every cell of the body.or certain body systems such as the brain and the nervous system, , carbohydrates are the preferred energy source. The brain an nervous system are sensitive to the concentration of glucose in the blood. Normal blood glucose levels are important for a feeling of well being.