Question

if the walls in the veins of the legs fails to stop the flow of blood what could be the consequences of this failure

Answer 1

the blood might clot and thus this situation would lead to many problems

hope this might help u

Answer 2

The blood from the legs may not be sent back into the heart for oxygenation and this ultimately leads to the death of cells in the leg portion so I think because of it we can't walk properly