Distinguish between a parasite and a saprotroph

$\text{Parasite}$	$\text{Saprotroph}$
Parasites are organisms that grow on the body of another organism for their food.	Saprotrophs are organism that feed on dead and decaying organic matter for their nutrients.
They depend on hosts for readymade food.	They depend on digested and decayed food.
They directly feed on living organisms for their nutrition.	They feed dead and decayed organisms.
For example: Cactus and Orchids.	For example: Fungus and some bacteria.