text: to prevent the backflow of the blood, ಯಾಕಂದ್ರೆ there can be backflow of the blood pressure ಅಷ್ಟು ಇಲ್ಲದಿರುವ ಕಾರಣ there can be backflow of the blood as well. So that is why veins are the one which will be actually having