(A) This is the structure of stearic acid ... Since there is only one double bond, oleic acid is an example of a monounsaturated fatty acid. This also illustrates the omega labeling system ...

Omega-3s are vital to heart health, brain health, fetal and infant development, cell structures ... For example, a healthcare provider may recommend taking an omega-3 fatty acid supplement ...

(C) The subregions of a glycerophospholipid molecule; phosphatidylcholine is shown as an example. The hydrophilic head is composed of a choline structure (blue) and a phosphate (orange).