The lipids are a large and diverse group of naturally occurring organic compounds that are related by their solubility in nonpolar organic solvents (e.g. ether, chloroform, acetone & benzene) and general insolubility in water.hospholipids are the main constituents of cell membranes. They resemble the triglycerides in being ester or amide derivatives of glycerol or sphingosine with fatty acids and phosphoric acid.
What causes lung nodules? Quick Answer. According to the Seattle Cancer Care Alliance, lung, or pulmonary, nodules have numerous causes, including fungal or bacterial infection, sarcoidosis, lymphoma, lung cancer and cancers metastasized from other organs.
Thyroid nodules have a variety of causes. 1  Colloid nodules develop from a lack of iodine, which is a mineral essential to the production of thyroid hormones. These growths are noncancerous, but they may be large.  Thyroid cysts are either filled with fluid, or a mixture of fluid and solid tissue.