Lysosome:
• They are tiny sac-like granules containing enzymes of intracellular digestion.
• They are bounded by a single membrane.
• They occur in animal cells and a few plant cells.
• They do not have a definite shape or size.
Functions :
(a) Their main function is phagy = digestion.
(b) They are kind of waste disposal system.
(c) They help in digesting foreign materials & cells.
