The next few chapters discuss the head, with its complexly lobed brain major sensors the eyes, ears, and nose and the mouth and throat. One of its principal jobs is to keep out dangerous microbes, yet deep inside, trillions of good microbes colonize the gut, help with digestion, and influence body processes. These atoms are assembled by instructions from the DNA at the center of each of the trillions of cells that make up an adult human. The Body also contains dozens of anecdotes on the researchers, often unsung, who made the discoveries that led to the great advances of medicine.īryson begins with an inventory of the elements that make up the body: In purified form, they would cost over $150,000.
It explores the various organ systems-skin, brain, eyes, nose, mouth and throat, heart and blood, skeleton, lungs, digestive tract-as well as multisystem experiences like digestion and energy production, immunity and disease, sleep, sex, childbirth, old age, and death. Compiled for the general reader, The Body is a compendium of facts, many amazing or weird, about human anatomy and physiology.
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