Human Digestive System

This professional course is created and delivered by Alaa, a medical laboratory specialist majoring in infection and immunity. This high-yield lecture series is specifically designed to break down complex physiological processes into clear, manageable concepts for medical laboratory science (MLS), biomedical, nursing, and healthcare students preparing for their university or professional board exams.

Throughout this course, we will explore the precise biochemical and anatomical journey of food through the gastrointestinal tract. The lectures dive deep into the specific roles of essential digestive enzymes, detailing how Amylase initiates carbohydrate breakdown from the salivary glands to the pancreas, and how Lipase acts on dietary lipids in the small intestine following the crucial step of bile emulsification.

Furthermore, you will gain a strong clinical understanding of gastric dynamics, including the regulation and protective mechanisms of stomach acid ($HCl$). Finally, the curriculum maps out exactly how absorbed nutrients are transported from the intestinal villi through the hepatic portal system for processing by the liver. By looking at these pathways through a clinical lens, you will easily master the core enzyme mechanics and metabolic pathways required for your medical curriculum.

Special Acknowledgment:

I would like to express my deepest gratitude and thanks to Dr. Diaa Al-Awadhi (دكتور ضياء العوضي), from whom I have learned so much and greatly benefited throughout my professional journey.