<prompt> The first step for lymphatic vessels to remove excess fluid from interstitial tissue spaces is byGenerating a lower intravascular than tissue hydrosta tic pressureContracting and forcing lymph into larger lymphaticsOpening and closing one-way valves in the lymph vesselsLowering the colloid osmotic pressure inside the lymph vessel  <response>: Although all of the choices are events that happen in lymph vessels, the first key event is lowering the lymphatic hydrostatic pressure to enable tissue fluid to enter the lymphatic vessel. 