So one of the beauties are recording this lecture is there is a lot of kind of detail to write down so one thing that you can do report structure function look at what you’ll notice is that they have the outer wall and much thinner and big thick layer of muscle as well as elastic fibers veins and contrast to arteries what you notice is that they’re very thin, so those two layers we were talking about the outer wall and the wall that’s kind of in the middle that has muscle and the last Fibber Those are much much thinner when you compare veins right what’s is that they have a very large back diameter, arteries and veins. Arteries are slightly bigger and diameter, but there doesn’t seem to be like a huge difference right from wall to wall wall to wall. In terms of what I have to look at is, you have to actually look at the diameter of the woman is the Lan  Hollow where blood veins have a larger woman, they can actually hold a lot more rare of muscle and elastic fibre for the arteries. This is actually gonna be really important because it helps the arteries with stands very high pressure. Capillaries are going to be very very tiny diameter we talked about is really small  Arteries all these different layers, it’s just made Backup single so extreme nutrients and waste and you don’t want all these layers in between the blood and the blood between the blood and the organs because it’s gonna be a lot harder to exchange, nutrients and waste really many layers and thick layers right. The arteries veins can be these many layers because the point of arteries and bases to deliver blood to the organs or to the heart function and the capillaries, they are the actual exchange exchange so we wanna make sure we don’t have all those layers that would make it very difficult to do that function so again structure function always 

The artery has thick muscle and elastic fibers ability withstand and can change pressure.

blood flow Velocity is higher in artery and lower in capillary . 

The vein vessels wall is thinner than arteries.It has larger diameter compared to arteries. Can hold more blood volumes.