磷脂分子可以形成的结构 Aqueous Individual units are wedge-shaped Individual units are cavity (cross-section of head cylindrical(cross-section of greater than that head equals that of side chain) of side chain) Micelle Bilayer Liposome (a) (b) (c) 微囊 脂双层 双层微囊磷脂分子可以形成的结构 微囊 脂双层 双层微囊