Here’s what you’ll learn when you read this story:Hemifusomes are fused vesicles, or sacs of fluid, that were previously unknown to exist inside cells. The cells, which were kept at cryogenic temperatures, were imaged in two dimensions using an electron microscope. Superfast cameras then took multiple photos of the frozen cells and their organelles. The cell’s plasma membrane will fold inward to surround matter, such as food molecules, in the surrounding fluid. Related Story This Altered State of Consciousness Feels MagicalWhat makes hemifusomes so important is how they collect and recycle junk proteins.