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.
When youâre fighting off harmful germs, your body makes more of those immune cells -- that causes the swelling. Your lymph nodes come across all kinds of germs, so they can be swollen for lots of reasons. Usually, itâs something thatâs easy to treat, like a cold, an ear infection, or an abscessed (infected) tooth.