00:02
So problem 12 asks about how a fish heart is specifically adapted to its environment.
00:06
So let's talk about fish versus humans.
00:10
So human heart, fish heart.
00:19
Okay.
00:20
So human heart has four chambers, whereas a fish heart has two chambers.
00:34
This is a double circuit.
00:39
And this is a single circuit.
00:43
So humans have lungs.
00:48
So lungs are connected with the heart.
00:52
Whereas fish have gills, which are connected to the heart.
01:03
Not connected, but a part of that circuit.
01:06
So as humans, we breathe in oxygen from our environment, goes into our lungs, and then our double circuit goes, heart lungs, heart body...