Final answer:
Fat digestion predominantly takes place in the small intestine, where bile and pancreatic lipase break down lipids into absorbable forms.
Step-by-step explanation:
The majority of fat digestion takes place in the small intestine. This is where lipids, having been mechanically broken down through chewing and stomach actions, arrive largely undigested. The lipid digestion process is facilitated by bile, which emulsifies the fats, effectively breaking them down into smaller droplets, and by pancreatic lipase, an enzyme that breaks down these emulsified fats into fatty acids and glycerol. Bile is produced by the liver, but it is concentrated and stored in the gallbladder before being released into the small intestine. The small intestine is also where the majority of nutrient absorption takes place, making it a critical part of the digestive system for fat digestion.