(i) Various organs in the human body become less efficient or completely functionless due to various reasons like egeing, accidents , infections, disorderts etc.
(ii) Life of such person becomes difficult or fatality may occur .
(iii) Many organs in human body remain funtional for certain period even after death occurs under specific conditions.
(iv) These organs can be transplanted on donation . hence , certain organs like heart , kidney , eyes, liver, heart valves , skin , etc. are more valuable.
