👉 Endocytosis is a type of cellular process in which a cell uses its own organelles to engulf and digest other cells or molecules. This process occurs within the endoplasmic reticulum, a network of organelles located between the plasma membrane and the nuclear envelope of a cell. Endocytic vesicles are small, vesical structures that contain digestive enzymes and receptors for signaling molecules. These vesicles then fuse with the inner mitochondrial membrane, allowing them to enter the cy