Answer
The main functional cells of an organ are called $parenchyma$
The other supportive tissues are called $stroma$
Work Step by Step
$Paranchema:$
is the main functional parts of an organ, or of a structure such as a tumor in the body. This is in contrast to the stroma, which refers to the architectural tissue of organs named as, the connective tissues
$Stroma:$
is a organ with a connective role. It is made up of all the parts without specific functions of the organ
