The lowest-priced item that has been used or worn previously.The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a display model or store return that has been used.See details for description of any imperfections.
Discusses human form and function. This text presents a large, complex body of scientific knowledge in an easily understood writing style. It uses a 'big picture' theme of body function and explains the body's homeostatic regulation.