part of Tube development GO:0035295 IEV:0002713 The process whose specific outcome is the progression of a tube over time, from its intial formation to a mature structure. Epithelial and endothelial tubes transport gases, liquids and cells from one site to another and form the basic structure of many organs and tissues including lung and trachea, kidney, the mammary gland, the vascular system and the gastrointestinal and urinary-genital tracts. event Multicellular organismal development Anatomical structure development