An endosome is a membrane-bound compartment inside a eukaryotic cell. It is originated from the trans Golgi network and is an organelle of the endocytic membrane transport pathway, where various cargo molecules required for normal cellular function are internalized, recycled and modulated. Endosomes can be classified as early, sorting, or late depending on their stage post internalization, which mature into lysosomes at the end of the endocytic pathway. Their major function is to provide an environment for material to be sorted before it reaches the degradative lysosome.