ELA.6.9A Compare and contrast the stated or implied purposes (e.g., inform, influence, entertain, express) of different authors writing on the same topic. ELA.6.10A Summarize the main ideas and supporting details in text, demonstrating an understanding that a summary does not include opinions.
The shape of the breast, its size, position of nipple and their numbers are also genetically determined. Any alteration in the basic genes or the presence of a predetermined gene that governs the shape and size of the nipples can cause the nipples to be inverted.
As the breasts age, the milk ducts behind the nipple get shorter and wider, and may produce a discharge. This is a normal, age-related change and nothing to worry about. A lump can sometimes be felt behind the nipple, which is just scar tissue or perhaps a dilated duct, and the nipple sometimes becomes inverted.