Calcium

a metallic substance with the symbol Ca which is common in nature being found in both plants and animals. It is essential for the normal growth and development of animals, being found in bones, teeth, blood and nerves.

Taken from Dictionary of Science

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Calcium (pronounced /ˈkælsiəm/, KAL-see-əm) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078 amu. Calcium is a soft gray alkaline earth metal, and is the fifth most abundant element by mass in the Earth's crust. Calcium is also the fifth most abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

Calcium is essential for living organisms, particularly in cell physiology, where movement of the calcium ion Ca²⁺ into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bones and shells, calcium is the most abundant metal by mass in many animals.

Taken from Wikipedia

Khakies and Dental Lasers

Khakies have become an essential part of good dressing. Whether the occasion calls for dressing up or dressing down, men have always turned to khaki for salvation. They seem to go well with everything.

Taken from The Star Life

Dental lasers have existed for about twenty-six years...Unlike scalpels, lasers seal off blood vessels as they cut, leaving behind a dry area for dentists to work in. This decreases the chance of transmitting germs.

Taken from The Philippine Star