00:01
Okay, when i answer this question, let's talk about the venous valves.
00:04
Let's imagine this is one vein in your leg, okay? remember that this vein is going to have the oxygenated blood, and this blood is going to, well, it is going to have low levels of oxygen, so it has to move upwards in order to reach the heart that is like about here.
00:27
Okay, once it gets, it gets out to the heart, it is going to move to the lungs and it is going to be oxygenated via the process of gas exchange.
00:38
And it is going to come back to the lungs and then it is going to be injected to the system, to a systemic circulation.
00:46
So as you can see here, this blood is coming from your inferior or from your leg, for example.
00:52
So it's going to fight against gravity because gravity is going to push this blood like downwards.
01:00
Okay, so in order for this blood to be pumped, upwards towards the heart, you're going to have some valves here.
01:10
Okay, so practically when this blood moves here, these valves are going to prevent blood to gurgitate like downwards because of gravity, okay? so you're going to have many valves here and they are going to prevent this venous blood to go back to the, or to fall because of gravity...