Angiosperms have the organs of both male and female reproductive systems. The flower must go through a pollination process to reproduce.
The stamen is the male sex organ. The pollen is made on the end on the anther. The pollen must get from the stamen to the pistil, which is the female organ. Once it is on the pistil, it is sent down to the ovaries of the flower to begin the reproduction process. The pollen can be moved through the wind or by being carried by the birds and bees. When animals drink from the flowers, a bit of the pollen adheres to their bodies and is moved to the next flower.