18
chapter
2
Chemical
Composition of
the Body
Atoms
Atomic Number
Atomic Weight
Atomic Composition of the Body
Molecules
Covalent Chemical Bonds
Molecular Shape
Ions
Free Radicals
Polar Molecules
Hydrogen Bonds
Water
Solutions
Molecular Solubility
Concentration
Hydrogen Ions and Acidity
Classes of Organic Molecules
Carbohydrates
Lipids
Proteins
Nucleic Acids
ATP
a
toms and molecules
are the chemical units
of cell structure and
function. In this chapter we
describe the distinguishing
characteristics of the major
chemicals in the human body.
The speciļ¬ c roles of these
substances in physiology will
be discussed in subsequent
chapters. This chapter is, in
essence, an expanded glossary
of chemical terms and
structures, and like a glossary,
it should be consulted as
needed.
Computer graphic of
hemoglobin molecule.
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