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Lysosomes and Endocytosis
Lysosomes are membrane-bound vesicles that contain enzymes needed for intracellular digestion of all types of macromolecules
Endocytosis is the process in which the cell takes up solutes or particles by enclosing them in vesicles (endosomes) pinched off from the plasma membrane
1	Phagocytosis-endocytosis of large particles by engulfing them into a phagocytic vacuole (phagosome)
2	Pinocytosis-endocytosis of small amounts of liquid with its solute molecules
Material in endosomes is digested with the aid of lysosomes, which fuse with the endosomes
Lysosomes join with phagosomes for defensive purposes such as to destroy invading bacteria
Autophagic vacuoles are lysosomes that selectively digest portions of the cellís own cytoplasm as part of the normal turnover of cellular components
Proteasomes are a nonlysosomal protein degradation system that has been recently discovered in eucaryotic cells, a few bacteria, and many archaea