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

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

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

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5 Composition of lipoproteins

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

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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

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9 Fat cell