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.
(February 2012) A root cause is an initiating cause of either a condition or a causal chain that leads to an outcome or effect of interest. Commonly, root cause is used to describe the depth in the causal chain where an intervention could reasonably be implemented to improve performance or prevent an undesirable outcome.