Page 266 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Lipid digestion: overview
Dietary fats Stomach
Lipases from
Mechanical emulsifi- stomach and
cation by stomach tongue
Bile salts
Degradation in
stomach (10–30%) Pancreatic lipase
Pancreas
Duodenum
Lipid Digestion
Degradation and micelle Excreted as
formation in duodenum and calcium soaps
jejunum (70–95%) Absorption in intestine (ca. 5%)

B. Lipid digestion: degradation and micelle formation
Plate 10.14
Emulsification Stomach
1–2µm
1 Oil phase Emulsified
triacylglycerols
TG and other
lipids

Chyme
Lipase

MG+FFA H 2 O
20–50nm
BS

2 Viscous–isotropic phase

Triacylglycerol (TG)
Micelles
2-Monoacylglycerol (MG)
Free fatty acids (FFA) Mucosal cell
Apolar lipids
253
Bile salts (BS)
3 Micelle phase (After Patton)
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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