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They have small valves, which prevent the back flow of blood. Also the tunica externa is the outer layer of the vein wall, and is made up, for the most part, of connective tissue (collagen mostly). This has a protective function, and protects the vein from damage due to external pressures and physical damage - this is particularly important given that veins often run close to the skin.
What else can I help you with?
What is the function of the renal vein?
The main function of a renal vein is to carry blood from the kidneys
What is the function of Iliac vein?
The function of the common iliac vein is to drain into the inferior vena cava. The common iliac vein forms in the abdomen and is a connection of the internal and external iliac vein.
What is the function of the lateral vein in a leaf?
lateral vein is hindi ko alam
What is the function of lateral vein in the leaf?
lateral vein is hindi ko alam
Can a heart function without a vein?
no
What is function of renal vein?
the main function of a renal vein is to carry urine to the kidneys
What is the function of thepulmonary vein?
pulmonar vein pumps the oxygenated blood from lungs to heart (left atrium).
What is the pulmonary vein's function?
The pulmonary vein transports oxygenated blood back to the right atrium from the lungs.
What the function of central vein?
To transport blood to the liver
What is the function vein?
The inspiration is now open because of the ''vein''.. This vein is bring blood to heart and for you will not die to avoid using diagram of your any parts system .
What is the function of umbilical vein in fetus?
The function of the umbilical vein is to deliver oxygenated blood from the placenta to the fetus. From the placenta, the umbilical vein courses through the liver via the ductus venosus (fetal shunt), connecting then to the inferior vena cava.
What is the function of the ovarian vein?
Take blood away from the ovaries
