title: Long-term adaptation mechanisms in extremity veins supporting orthostatic tolerance.
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D000818:Animals; D006112:Gravitation; D006801:Humans; D007024:Hypotension, Orthostatic / Q000503:physiopathology*; D009131:Muscle, Smooth, Vascular / Q000166:cytology / Q000502:physiology; D051381:Rats; D012039:Regional Blood Flow / Q000502:physiology; D012501:Saphenous Vein / Q000294:innervation / Q000502:physiology; D014680:Veins / Q000294:innervation / Q000502:physiology*