The following shows the orbital structure of carbon:
Human molecular formula
The position of the element calcium in the average human molecular formula is as follows:
An oft-used ideal in attempting to theorize in the overlapping gray area of the period table of elements, which are clearly not "alive" and the biological realm of phenomenon, which are considered as being "alive", by virtue of our ingrained mythological-religious heritage, is the term carbon life (carbon-life), carbon-based life, etc., according to which carbon-based entities are considered as being alive or living, which is a fact solely due to the "animation" and "flexibility" inherent in the carbon atom, owing to its four-pronged bonding geometry, which reacts to light stimulus.
In the average human molecule, carbon constitutes 23 percent by mass of the human and is a major elemental component of carbohydrates and fats. 
In the context of hmol science, when thinkers begin to extrapolate evolution backwards to the atomic-level, in attempts to figure out or explain human existence, the carbon atom is a frequent stopping point for discussion. Most of the material substance of the central nervous system, for example, is comprised of hydrogen and carbon, such as in the animate retinal molecule.
English biotechnologist Mark Janes employs a carbon-centric view of a human in his Mr. Carbon Atom depiction and his 2009 carbonentromorphology theory.
In the 2010 book The Universe, God, and Us, American writer Provident Peterson outlined the view that humans are material substance made of atoms that formed from a descendant of the first God-infused Alpha ‘human molecule’, which itself formed from the first God-infused Alpha atom, which Peterson posits was carbon.
The following are related quotes:
“Why should a group of simple, stable compounds of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), 'struggle' for billions of years to organize themselves into a professor of chemistry? What's the motive?”– Robert Pirsig, Lila: an Inquiry into Morals (1991)
1. Peterson Jr., Provident G. (2010). The Universe, God, and Us (human molecule, pgs. 38, 55). Dorrance Publishing Co.
2. Thims, Libb. (2008). The Human Molecule (issuu) (preview) (Google Books) (docstoc) (pgs. 52-55). LuLu.
● Carbon – Wikipedia.