High density lipoprotein
High Density Lipoprotein (HDL)
High Density Lipoprotein (HDL) /haɪ dɛnsɪti lɪpəˈproʊtiːn/ is one of the five major groups of lipoproteins which enable lipids like cholesterol and triglycerides to be transported within the water-based bloodstream.
Etymology
The term "High Density Lipoprotein" is derived from its high protein to lipid ratio, which gives it a higher density compared to other lipoproteins.
Function
HDL is often referred to as the "good" cholesterol because it transports cholesterol from the tissues of the body to the liver, where it can be removed. This process is known as reverse cholesterol transport (RCT) and is beneficial to the organism because it can help to prevent atherosclerosis, a condition that can lead to heart disease and stroke.
Related Terms
- Low Density Lipoprotein (LDL): Often referred to as "bad" cholesterol, LDL transports cholesterol from the liver to the tissues of the body.
- Cholesterol: A waxy, fat-like substance that's found in all the cells in your body.
- Triglycerides: A type of fat (lipid) found in your blood.
- Atherosclerosis: A disease in which plaque builds up inside your arteries.
- Reverse cholesterol transport (RCT): The process by which cholesterol is transported from the tissues of the body to the liver.
External links
- Medical encyclopedia article on High density lipoprotein
- Wikipedia's article - High density lipoprotein
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