stamen are the male productive organs in a flower where anthers produce pollen grains while pistil is the female productive organs in a flower where the stigma will receive the pollen grains
Stamen is the male part of flower and pistil act as female part.
In angiosperms, during pollination the pollen grains move from stamen's anther that is male part to the pistil's stigma that is female part of the same flower or another flower.
