Answer:
Tissue fluid is formed because of the high hydrostatic pressure of the blood at the arteriole end of the capillary that pushes fluid out of the blood.These valves are large enough to allow proteins, which are too big to get into the capillaries, into the lymph vessels.
or
Tissue fluids is formed because of the high Hydrostatic pressure of the capillary that pushes fluids out of the blood. These valves are large enough to allow protiens, which are too big to get into the capillaries, into the lymph vessel.
Step-by-step explanation: