SV
= Secretory vesicle; RER
= Rough endoplasmic reticulum; BM
= Basement membrane; MFG
= Milk fat globule; CLD
= Cytoplasmic lipid droplet; N
= Nucleus; PC
= Plasma
cell; FDA
= Fat - depleted adipocyte; TJ
= Tight junction; GJ
= Gap junction; D
= Desmosome; ME
= Myoepithelial
cell.