caption: The image shows a black and white drawing of a cell membrane with a white background. The cell membrane is composed of a series of interconnected cells, each with its own unique shape and texture. The cells are arranged in a symmetrical pattern, with some overlapping each other, creating a complex network of lines and shapes. The white background provides a stark contrast to the dark lines of the cell membrane, making it stand out and draw attention to the intricate details of the structure.