The phospholipides are Lipide S having a group Phosphate, that is to say:

• the Phosphoacylglycérol S (more known under the name of glycérophospholipides);
• the phosphosphingolipides and the phosphonosphingolipides;
• phosphosaccharolipides.

The phosphoacylglycérols and the phosphosphingolipides are often represented schematically by 1 absorbent head (radical polarized related to the group phosphates) and 2 hydrophobic tails (fatty-acids) what their give a character Amphiphile. The phospholipides are the principal components of the Membrane S Cellulaire S (cytoplasmic Membrane, membranes of the intracellular organoids); their amphiphilic properties enable them to be organized into double-layered, the hydrophobic tails directing itself towards the interior of double-layered, the absorbent heads directing itself towards mileux extra and the intracellular aqueous ones. A phosphatidylcholine, the dipalmitoylphoshatidylcholine (two palmitic acids) is constituent major pulmonary Surfactant. The phosphosphingolipides are abundant in the Nervous system, in particular in the sheath of Myéline

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