Khan Academy Static

3B: You begin with mechanical digestion in your mouth, where starches are also broken down. The bolus of food travels down your esophagus into the stomach, where it sits and churns, further allowing for breakdown of biomolecules like fat and protein.The contents of the stomach then enter the small intestine, which is where the bulk of digestion and absorption of nutrients occurs through the work of shear mechanical (peristalsis) and chemical (digestive enzymes) force. Then our food commutes through the large intestine (AKA the colon), where most of the fluid absorption in the GI tract occurs. Phew! Eating sure is a lot of work! By Raja Narayan.

15071_Hepatic_lobule.html

15067_Small_intestine_1_Structure.html

15068_Small_intestine_2_Digestion.html

15072_Biliary_tree.html

15074_Endocrine_pancreas.html

15073_Exocrine_pancreas.html

15069_Small_intestine_3_Absorption.html

15070_Liver.html

15064_Teeth.html

15075_Colon_rectum_and_anus.html

15076_Control_of_the_GI_tract.html

15066_Stomach.html

15062_Meet_the_gastrointestinal_tract_.html

15063_Mouth.html

15065_Esophagus.html