Question

a new drug delivery system which is composed of phospholipids that form a multilamellar concentric bilayer vesicles with layers of aqueous media separating the lipid layers

Answer 1

Liposomes are artificial vesicles comprised of lipid and aqueous compartments where the lipid exists in the bilayer form. Such vesicles can be composed solely of phospholipids or in combination with other amphipathicmolecules such as sterols, long chain organic bases or acids.