الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The human body is continually protecting itself from the outside world. To shield itself from harmful environmental stimuli, the body employs its cells, biochemicals, organs and tissues. The complex interaction of these physiological systems produces immunity. Some of these systems have dual roles: The digestive system, for example, not only extracts and absorbs nutrients from foods but also destroys pathogenic organisms that may be present in foods. Other immune system components are more focused: White blood cells are specifically designed to destroy invading organisms. One of the immune system’s more extraordinary features is its ability to respond to the environment. When a threat is encountered, the immune system can mount an attack specifically designed to neutralize it. This is demonstrated most clearly in the antigen-antibody interaction. Antigens are proteinlike substances that identify living matter, much like biochemical name tags. When a white blood cell encounters another living organism--a bacterium, virus or normal human cell--it checks the name tag. When the system is working properly, if the tag says anything other than ”self,” the white blood cell considers the organism a hostile invader. Other immune cells are alerted and information gleaned from the antigen is used to design antibodies precisely configured to destroy both the antigen and the organism that carried it into the body. This study aimed to investigate the effect of some plants, herbs, whey and soy protein on immunity status of rats.