00:01
Okay, so the question says that you're asked to invent substitutes for blood vessels, arteries, capillaries, and veins.
00:10
What materials might you use to build them? include synthetic as well as natural materials.
00:16
Justify why you chose such materials and consider the structural differences between each vessel and include inadequately labeled drawing or sketch.
00:26
Okay, so for your arteries, we need vessels that.
00:33
Have high sort of distensibility and recoil, right? and so arteries typically have thicker walls that are, have high elastin, especially in the aortic arch or the aorta, right? and so the heart is going to generate a lot of pressure and propel blood into these arteries.
00:54
So they need to be able to distend or deforms to enlarge.
00:58
And then once the heart is done contracting, they need to then recoil and push that blood on further, right? and so we need some elasticity, right? and we need some recoil in our arteries.
01:16
And so the best substances here would be rubber tubing or elastic tubing.
01:27
Both are naturally occurring substances, right? we need something that can stretch and then snap back into shape in our arteries.
01:36
They can withstand high pressure and get go back to their original shape and size.
01:41
And so if we had a series of different diameter elastic and or rubber tubing, that would be great for running our arteries.
01:52
Now our capillaries, our capillaries are small and thin, right? we really just let one blood vessel or blood cell at a time through to allow a lot of transport, into and out of those substances, right? so we need things that operate under low pressure, have thin walls, and will allow for movement of substrates into and out of the blood.
02:24
And so here we could use dialysis tubing, or we could use casing material, which is typically animal intestines, just the epithelial cell, or lining though...