(anatomy) a heart

movement of the body / gesture / operation of machinery

move / make a gesture / run, operate, be functional

flower petal / valve

(anatomy) valve (membranous partition, flap, or fold, which allows flow in only one direction, e.g. a heart valve) / valve (device that controls the flow of a fluid through a pipe)

flower petals

confirmation

confirm, make sure, check, verify

normal

something that is normal, normality