Digestion, Absorption, Metabolism, and Excretion

Discuss the topic of digestion, absorption, metabolism, and excretion.

What is the difference between mechanical and chemical digestion? In which one of the alimentary canal organs do most of the digestion and absorption take place? Explain the process. Describe how gluten affects celiac disease. Name three pathogens that commonly cause foodborne illness and discuss how they affect the body.