Absorption of Triglycerides
Lipids and glycerol move into the lacteals and join the lymphatic system.
Micelles are structures that are made of monoglycerides and bile salts 4-7nm in diameter.
When micelles come into contact with the epithelial cells lining the villi, they break down releasing monoglycerides and fatty acids.
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Key terms in this lesson
- hydrolysis
- The breaking of a covalent bond within a molecule using a water molecule.
- phospholipid
- A lipid in which one fatty acid is replaced by a phosphate group, giving a hydrophilic head and hydrophobic tails.
- triglyceride
- A lipid made of one glycerol molecule joined to three fatty acids by ester bonds.
- smooth endoplasmic reticulum
- A network of membranes without ribosomes, involved in the synthesis and storage of lipids and carbohydrates.
- Golgi apparatus
- A stack of membrane-bound sacs that modifies, packages and transports proteins and lipids, forming secretory vesicles and lysosomes.
More in Digestion
- The Digestive System
- Carbohydrate Digestion
- Lipid Digestion
- Protein Digestion
- Structure of the Ileum
- Absorption of Amino Acids
- Absorption of Monosaccharides
- Absorption of Fatty Acids
All 10 lessons in Digestion · All AQA AS-level Biology topics