作者: Franz Hartmann , Harro Jenss
DOI: 10.1007/978-1-4899-2447-6_8
关键词: Gastrointestinal tract 、 Nutrient absorption 、 Secretory component 、 Medicine 、 Respiratory tract 、 Mucus 、 Bile acid 、 Physiology 、 Body surface area
摘要: With its mucosal surface thought to be 200 times the body area, gastrointestinal tract is a major route of exposure pathogenic organisms and environmental chemicals. Food- water-borne chemicals enter via tract. Most agents are ingested; however, some inhaled substances swallowed after being trapped in mucus respiratory Thus, apart from classic role nutrient absorption, must also protect assault (83, 89, 109, 137, 166).