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5CaCa1.4Calcium20
In chemistry, calcium, symbol Ca, atomic number 20, is a metallic element, the fifth most abundant element in an average person, comprising 1.4 percent by mass of the structural composition of one human molecule. [1]

Human molecular formula
The position of the element calcium in the average human molecular formula is as follows:

CE27HE27OE27NE26PE25SE24CaE25KE24ClE24NaE24MgE24FeE23FE23
ZnE22SiE22CuE21BE21IE20SnE20MnE20SeE20CrE20NiE20MoE19CoE19VE18

Function
Calcium is used in the development and maintenance of bone structure and development. Functions in the clotting process, nerve transmission, muscle stimulation, parathyroid hormone function, and metabolism of vitamin D, etc. [1]

Quotes
The following are related quotes:

“Why should a group of simple, stable compounds of carbon, hydrogen, oxygen and nitrogen struggle for billions of years to organize themselves into a professor of chemistry? What's the motive? If we leave a chemistry professor out on a rock in the sun long enough the forces of nature will convert him into simple compounds of carbon, oxygen, hydrogen and nitrogen, calcium, phosphorus, and small amounts of other minerals. It's a one-way reaction.”
Robert Pirsig (1991), Lila: An Inquiry into Morals [2]

References
1. Thims, Libb. (2008). The Human Molecule (pg. 14) (issuu) (preview) (Google Books) (docstoc). LuLu.
2. Pirsig, Robert M. (1991). Lila: An Inquiry into Morals (excerpt, pg. 140; chemistry, 11+ pgs). Random House.

External links
‚óŹ Calcium – Wikipedia.

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