The mammary gland consists of ducts and alveolar buds that form through branching morphogenesis, which is controlled by similar mechanisms as epithelial-to-mesenchymal transition (EMT).
Kirtillinn samanstendur af kirtilgöngum og kirtilberjum sem myndast með greinóttri formmyndun, en henni er stýrt með ferlum sem eru nátengdir bandvefsumbreytingu þekjufrumna (epithelial to mesenchymal transition-EMT).