Lipids are essential organic macromolecules that are insoluble in water. Lipids are formed in the body at the end of complex biosynthetic pathways. Some lipids are crucial, and they need to be a part of your diet. Lipids include hormones, fats, oils and waxes. Lipids are vital to your health, but they can lead to diseases when in excess. There are three main lipids types: phospholipids, sterols, and triglycerides. One of the commonly asked questions is what is the structure and functions of lipids? We have covered the answer to this question in this article. 

Different classifications of Lipids

Before learning about the structure and functions of lipids, we will see their classification. Lipids are classified into three major groups based on their structure: simple lipids, compound lipids, and derived lipids. Simple lipids are esters with glycerol and other alcohols. Compound Lipids are fatty acids esterified with alcohol. Derived lipids are derived from lipids and precursors of lipids. Here we have discussed the three main classes of lipids. 

Phospholipids

Phospholipids are a subclassification of compound lipids. The outermost cell layer in animals and human beings comprises phospholipids. The phospholipids create a protective layer around the cells to maintain them. Photo Leopard is involved in metabolism and cell signalling.

Sterols 

Sterols are a type of hormone. Sterols are synthesised in the liver. They contribute to many functions in the body. Cholesterol is an example of sterol.

Triglycerides

Triglycerides are a subclassification of simple lipids. They are the oils and fats in your food; they can be saturated and unsaturated. The primary function of triglycerides is to act as an energy store.

Structure and Functions of Lipids

Structure of lipids

This organic compound is hydrophobic and water-insoluble. The structure and functions of lipids are pretty easy to understand. A few lipids are water-soluble. Biological fatty acids have one hydrocarbon chain with one terminal carboxyl group (COOH). Even though the molecule is hydrophobic and impossible, the negatively charged carboxylate is hydrophilic. Fatty acids also contain a carbon linked by one or two double bonds in addition to straight-chain hydrocarbon. 

Functions of Lipoproteins

To understand the importance of lipids, you need to learn about their functions in detail. Lipids function inside the body, and in the food you consume. Lipids serve as an energy store inside the body, cushion vital organs, regulate hormones, conduct nerve impulses, and carry fat-soluble nutrients. Fats function as an energy store with high caloric density and give texture and taste to the food. Let’s go through the functions of lipoproteins in detail.

• Energy source: Triglycerides are stored in the adipose tissue and are a significant energy source. Lipids are the best energy source for humans as they provide a considerable part of calories. Glucose is reserved in the body as glycogen. While glycogen offers a ready energy source, lipids primarily serve as an energy store. Glycogen is quite heavy with more water content; therefore, the body cannot store glycogen for a long time. Fat is burned down for energy during exercise after glycogen is over. 
• Regulating and Signalling: Lipids are constituents of the cell membrane structure that helps to maintain the fluidity and flexibility of the cell membrane. Triacylglycerols control the body’s internal climate intending to maintain a constant temperature. Those who don’t have enough fat in their bodies tend to feel cold sooner. 
• Pharmaceuticals: Pharmaceutical companies use lipids to make many drugs. The drugs differ widely and contain steroids to treat diseases like cancer and check hormones. In addition, lipids are added to a few medications for them to work better. With lipids, the drug will last longer and improve the absorption of the drug. 
• Nutrients: Some lipids are essential nutrients such as fat-soluble vitamins A, which is crucial for vision, D for calcium metabolism, present in some fats and oils of animal origin, vitamin E for autoxidation of acids.
• Growth: During growth, Lipids are termed “bricks” to construct biological membranes to form that barrier that separates the cell from the environment.
• Hormones: Many lipids, such as steroid hormones, like estrogens, androgens and cortisol, are formed from cholesterol.
• Regulator: Lipids such as diacylglycerol, platelet-activating factors ceramides and sphingosine act as regulators of intracellular processes.

Conclusion

By now, you know the importance of lipids and the structure and functions of lipids. Lipids are an essential constituent in everyone’s body. All lipids are not created in the body equally, and high levels of LDL can pose a severe risk. So keep an eye on your lipid levels to have a healthy lifestyle. The three types of lipids, phospholipids, sterols, and triglycerides, are needed for different functions in the body. They provide many health benefits.

Whereas simultaneously, triglycerides and cholesterol can also pose health risks if levels of these lipids are not kept under control. The foods you eat can add LDL cholesterol and increase triglycerides, which can cause health issues.