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. Lymphadenopathy causes are numerous. A doctor should determine whether the swollen lymph nodes have anything to do with a particular condition. Remember that what you find on this page is not an exhaustive list, and it is possible that enlarged nodes could be caused by another condition.wollen lymph nodes may be brought on by a variety of reasons. Some occur due to local infections, while others can appear due to systemic conditions or diseases. A similar term is lymphadenitis, which refers to inflammation of the nodes.