Hydrostatic.
I've been seeing the answer as "hydrostatic pressure" on other websites, but I am pretty sure it is Blood Pressure. I hope I was able to help :/
The reason fluid leaves at the arterial end of the capillary bed and returns to the venous end of the capillary bed is the difference in hydrostatic pressure. This means the pressure against the inside of the vessel is greater that the pressure on the outside of the vessel on the arterial end and vice-versa on the venous end. Also, loss of water at the arterial end very slightly raises the oncotic pressure on the venous end, although to what degree this adds to the return of fluid to the vasculature is unknown.
The capillary oncotic pressure is higher because of the plasma proteins trapped within the capillaries. The high oncotic pressure pulls the water from from the interstitium into the capillary.
water and waste will move in capillary . water and waste will move in capillary .
gravity * * * * * capillary pressure
Water pressure in plants is caused by capillary action generated by the surface tension of its water.
Water and dissolved substances leave the arteriole end of the capillary due to hydrostatic pressure being higher than osmotic pressure and enter the venule of the capillary due to osmotic pressure being higher than hydrostatic pressure.
Capillary action
osmotic pressure
Capillary Action
Capillary action.
Hydrostatic pressure(inside capillary) is higher than osmotic pressure it re-enters the capillary on venule end because inside the hydrostatic pressure is now lessthan osmotic pressure drawing water back in