00:02
When it comes to the purpose of veins, we're reminded that veins are designed to carry blood from certain body parts to the heart.
00:11
So that could be from our legs, arms, whatever it is.
00:16
And its job is to take that blood that has already dropped off oxygen and go back to the heart so that it can get more oxygen and then be pumped again to the rest of the body.
00:25
Now, that's the role of veins.
00:27
Now, veins are really important because as it's carrying that blood, let's say from our calf muscle, because that's a long way from our heart, we know that our calf is a nice long muscle there on the lower extremity of our leg there.
00:42
And it's going against gravity as it comes back up to the heart.
00:48
And that's really important because it takes a lot of force to get that blood back up to the heart area in order for this to take place.
00:55
Now, since that blood's going against gravity, there's something that we know called valves.
01:01
And these valves are being represented with those blue flaps here and here.
01:06
And think of valves like a door.
01:07
When blood goes through, it's in a close and then wait for more and then open and close and open and close.
01:13
And as long as that door is working great, it's going to get that blood to the heart and everything's functioning normal.
01:19
However, there's cases like varicose veins that happen.
01:24
And essentially, varicose veins, i'm going to go ahead and draw this diagram...