title: Role of the veins in the circulation.
mesh_terms: D000005:Abdomen / Q000098:blood supply; D001775:Blood Circulation; D001810:Blood Volume; D002463:Cell Membrane Permeability; D003094:Collagen / Q000378:metabolism; D004549:Elastin / Q000378:metabolism; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000166:cytology; D009132:Muscles / Q000098:blood supply; D012867:Skin / Q000098:blood supply; D013152:Splanchnic Circulation; D013564:Sympathetic Nervous System / Q000098:blood supply; D014661:Vasoconstriction; D014664:Vasodilation; D014680:Veins / Q000473:pathology / Q000502:physiology*; D014690:Venous Pressure
chemical_list: D003094:Collagen; D004549:Elastin