Fats that we consume are iron absorption. We all need micronutrients in small quantities to sustain health. Activates enzymes responsible for catalytic reactions between phosphate ions and. Dietary carbohydrates, fats and proteins mostly in the form of. Sometimes vitamin B2 can act as an antioxidant.
He goes on to say that eating is specifically not the ingestion of non-food substances such as clay, chalk, stones, and charcoal, but only the ingestion of materials that can be conceived of as foods proper for nourishment. As a result, they also exclude such potential foodstuffs as blood and urine. In the present article, we follow the lead of our predecessor in adopting this definition. Taking in nourishment is necessary for survival, and this usually involves eating. The following chapter provides an overview of the anatomy and physiology of eating, including the major nutritional processes that take place during digestion. Eating can be divided into the following processes: eating proper, or ingestion, whereby food enters into the body; and digestion, the process through which nutrients from food are extracted in the gastrointestinal tract. Digestion is followed by absorption, the process through which nutrients are passed through into the blood stream; and by excretion, through which indigestible and unabsorbable products from food are eliminated. The ability to eat and digest food hinges on an intricate, complex, and coordinated system known as the digestive system, all under control both of the central nervous system brain and spinal cord and of digestive system ‘s own intrinsic nervous system, which is sometimes called the body’s “second brain. The GI tract is a continuous tube that runs from the mouth to the anus.
Connections between nutrition and health have probably been generally understood by people for a long time. For example, around BC Hippocrates said, “Let food be your medicine and medicine be your food. Understanding the physiological needs of our biology helps us understand why food has such an impact on overall health. In this chapter we introduce nutrition by examining how cells use different nutrients and then discuss disease conditions that are tied to nutritional problems. Note however that nutrition impacts out biologic processes more than at a mere cellular level, alone our diverse genetic characteristics prevents any overgeneralization but then the multitude of fauna that share our bodies and divergent characteristics of human ecology and how it affects our biological chemical processes is of equal importance. The nutritional status of people in our communities is a concern not only for quality of life, but also for economics treating illness costs far more than preventing it. Various public health agencies are striving to prevent nutritional deficiencies and improve overall health. In the U. In addition, there have been many government agencies and voluntary health and scientific associations, such as the American Heart Association, that focus on life style and dietary factors that prevent chronic and life-threatening diseases. The U.