### lipid:

Phospholipid
* Many phospholipids have additions to the phosphate group, creating distinct headgroups.
* Most phospholipids also have a nitrogen compound.
* Some phospholipids have energy
  - kinetic energy
* are O amphipathic
  - among the most important parts of cell membranes
  - amphipathetic molecules, meaning they have hydrophilic and hydrophobic properties
  - amphophilic molecules with unique physicochemical properties
  - body fats, too
  - both polar and nonpolar
  - components of membranes which occur in foods and extracted oils
  - diglycerides that are covalently bonded to a phosphate group by an ester linkage
  - essential for trophoblast growth and development
  - fats that form cell membranes and potent cellular messengers
  - lipids which contain attached phosphate groups
  - lower but cholesterol and saturated fatty acids are higher in buffalo milk
  - major components of the cell membrane
  - natural biosurfactants with ability to form complexes with dietary fatty acids
  - necessary components of cell membranes
  - present in all living cells
* are the main component of the plasmalema and the tonoplast
  - constituents of cell membranes
* are the main structural components of all cellular membranes
  - lipids of cell membranes
  - most common molecules in membranes
  - primary constituent of the lipid bilayers of cells
* arrange in lipid bilayers, forming a cell membrane.
* assemble into a lipid bilayer.
* can form a variety of nonlamellar lipid assemblies.
* clump together when in contact with water,as shown in the diagram.
* containing alkene-like functional groups are also important
  - choline promote lipid transport in cell membranes
* form a bilayer, which is the basic structure of the membrane
* have a non polar hydrophobic tail and a polar head.
* help bind water to skin for maximum hydration.
* includes atoms.
* includes chemical chain
* is an organic compound
* make up much of the outer membranes of cells and organelles.
* play a key role in the structure of cell membranes
  - major role in determining the integrity and fluidity of cell membranes
* spontaneously form lipid bilayers , the basic structure of a cell membrane
  - in an aqueous medium
* undergo three types of motion.
* vary by head group, tail length and saturation.

Saturated lipid
* contain single bonds, and are found in butter and lard.
+ Biochemistry, Macromolecules, Lipids
  * Lipids are fats, and waxes. Saturated lipids contain single bonds, and are found in butter and lard. Unsaturated lipids have one or more double bonds. The human body stores lipids as an energy source. When the body needs a large amount of energy, lipid molecules are broken down to release that energy.

Serum lipid
* aggregate as exudates, and a build-up of serous fluid causes retinal edema.
* are normal and remain normal.

Simple lipid
* Simple Lipids Draw the structure of a simple triglyceride.
* are esters of glycerol.
* contain only carbon, hydrogen, and oxygen.

Unsaturated lipid
* have a more negative effect than saturated lipids
+ Biochemistry, Macromolecules, Lipids
  * Lipids are fats, and waxes. Saturated lipids contain single bonds, and are found in butter and lard. Unsaturated lipids have one or more double bonds. The human body stores lipids as an energy source. When the body needs a large amount of energy, lipid molecules are broken down to release that energy.