And then, when we label the diagrams,
the other thing we're talking about was all these valves.
And here, we cut through it, but you can see.
So this is your left AV valve.
And I think what's interesting about looking at that in detail
is how flimsy these structures really are.
And you think they hold all that blood back in the heart while it's contracting,
but the valve itself all it is is very thin.
But a very smooth surface on it.
It should be smooth because the blood should run
over it without any turbulence being caused.
So that's a nice smooth but very thin flimsy structure.
I've got a different heart here just to show you the aortic valve example.
So, the aortic valve has got a slightly different type of valve leaflet.
So, you often call this the semilunar because they look like a half moon shape.
So you can see that sitting there, it's a nice little half moon shape.
He's got three of those, and that's one of them there.
And again, you can see the AV valve here, that's the left AV valve again.
It's got these little tendons attaching it down to the muscle there, the cord or
tendon, but that's the valve itself, that smooth looking little structure.