What Is the Element Composition of Our Body?

What Is the Element Composition of Our Body?
The late, great Carl Sagan in his personal exploration of the cosmos said
that we are made up of "star stuff." What he meant was that our body is
made up of many of the very same elements that make up planets and
other celestial bodies in the universe. We humans, as well as other life-
forms on our planet, have simply borrowed these elements. Interestingly,
four of these elements, namely oxygen, carbon, hydrogen, and nitrogen,
make up greater than 90 percent of our body weight. Since the majority
of these elements are found in our body as part of substances such as
water, proteins, carbohydrates, fats, and nucleic acids (DNA and RNA),
it only makes sense that these substances must be the major chemicals of
Table 1.1 Elements of Our Bodies
Major Elements          Percentage of  Minor Elements        Percentage of
(>0.1% Body Weight)     Body Weight    (<0.1% Body Weight)   Body Weight
Oxygen (O)              63             Iron (Fe)             <0.1
Carbon (C)              18.0           Selenium (Se)         <0.1
Hydrogen (H)             9.0           Copper (Cu)           <0.1
Nitrogen (N)             3.0           Cobalt (Co)           <0.1
Calcium (Ca)             1.5           Fluoride (F)          <0.1
Phosphorus (P)           1.0           Iodine (I)            <0.1
Potassium (K)            0.4           Molybdenum (Mo)       <0.1
Sulfur (S)               0.3           Manganese (Mn)        <0.1
Sodium (Na)              0.2           Vanadium (V)          <0.1
Chloride (Cl)            0.2           Chromium (Cr)         <0.1
Magnesium (Mg)           0.1           Boron (B)             <0.1
                                       Zinc (Zn)             <0.1
                                       Aluminum (Al)         <0.1
                                       Tin (Sn)              <0.1
                                       Silicon (Si)          <0.1
                                       Arsenic (As)          <0.1