By Anne Marie Helmenstine, Ph.D. Lipids are a diverse group of fat-soluble biological molecules. Here is a look at different types of lipids and where they are found.1  Triacylglycerols or Triglycerides. 2  The largest class of lipids goes by different names: triacylglycerols, triglycerides, glycerolipids, or fats.y Anne Marie Helmenstine, Ph.D. Lipids are a diverse group of fat-soluble biological molecules. Here is a look at different types of lipids and where they are found.
Lymph nodes become swollen in response to illness, infection, or stress. Swollen lymph nodes are one sign that your lymphatic system is working to rid your body of the responsible agents. Swollen lymph glands in the head and neck are normally caused by illnesses such as: 1  ear infection.
Causes of Swollen Lymph Nodes. Neck Nodes. The cervical neck nodes are most commonly involved. This is because of the many respiratory infections that occur during childhood. Viral Throat Infection. This is the most common cause of swollen nodes in the neck. The swollen nodes are usually Â½ to 1 inch (12 -25 mm) across. They are the same on each side. Bacterial Throat Infection. A swollen node with a bacterial throat infection is usually just on one side. It can be quite large over 1 inch (25 mm) across. This is about the size of a quarter.