Why are breasts considered part of the female reproductive system?

While breasts are associated with the female body, they are not considered part of the female reproductive system. The female reproductive system consists of the organs involved in producing and nurturing offspring, including the ovaries, fallopian tubes, uterus, cervix, and vagina. Breasts, on the other hand, are classified as secondary sex characteristics and are primarily responsible for lactation and breastfeeding, which are essential for nourishing infants.