Pollen is formed in the anther of seed bearing plants. The anther is the male part of a plant. Pollen is transported to the pistil, which is the female part of a plant.
Pollen grains vary in shape and structure, and are a part of the mass of microspheres that make up pollen. Pollen appears as a fine dust. Pollen grains contain three distinct parts: the central cytoplasmic part, the intine and the exine. The central cytoplasmic part is responsible for fertilization. The intine and exine make up the wall of the pollen grain, with the intine being the inner layer and the exine being the outer layer.