contestada

What is the function of valves in veins? what is the function of valves in veins? they counteract low venous pressure, and prevent backflow of blood away from the heart. they are the reason that a relatively higher amount of blood resides in veins, compared to arteries. they help propel blood with great velocity. they compensate for the larger lumens of veins compared to arteries of similar size?

Respuesta :

a. they counteract low venous pressure, and prevent backflow of blood away from the heart - Venous valves are structures that are made of elastic tissue. The valves are there to ensure that the blood keeps moving in one direction. The veins use these valves to work against  the effects of gravity as well as low pressure with the veins.