1. 1 LIPID TRANSPORT Lipoproteins Lipids are transported in the blood as lipoproteins are soluble in water because the surface consists of polar lipids.

2. 2 Lipid transport Apolipoproteins + Lipids: Cholesterol Cholesteryl esters Triacylglycerols Phospholids lipoproteins Combine lipids with proteins and phospholipids.

3. 3

4. 4 The lipoprotein formed depends on the constituent protein and lipids There are 4 types of lipoprotein triglyceride protein Chylo VLDL LDL HDL

5. 5 Composition of lipoproteins

6. 6

7. 7 Lipid transport TG Bile salts (emuslification) TG Fatty acids glycerol INTESTINE INTESTINAL EPITHELIAL CELL TG Cholesterol apolipoproteins LYMPH/ BLOOD chylomicrons Lipases

8. 8 LIVER Lipid transport ADIPOSEMUSCLE VLDL TG Cholesterol Cholesterol- esters TG LDL Cholesterol Cholesterol-esters TG Cholesterol CMCONS HDL Cholesterol -esters TISSUES GONADS ADRENALS lymph Fatty acids albumin

9. 9 Fat cell