Lipid bilayer video for download. A lipid bilayer is the foundational part of all cellular membranes. The lipid bilayer is a thin biological membrane made from two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells. The cellular membranes of most organisms are created with lipid bilayer, as well as the nuclear membrane and various other organelle membranes. Transcytosis is a cellular mechanism that transports various macromolecules across the interior of a cell. Macromolecules are captured in vesicles on one side of the cell, drawn across the cell, and ejected on the other side. This intracellular vesicular traffic is also known as cytopempsisVFX experts Polymime offer 3d animation videos for download.