~~The round bumps are found in the areola, but also on the nipple itself. The skin over the surface opening are lubricated and tend to be smoother than the rest of the areola. The bumps become more pronounced during pregnancy.
The number of glands varies from four to twenty-eight.~~
28? really? I haven't counted. Learn something new every day.
P.S. Picture from internet source, not from my little canon digital.