00:01
Let's have interdependent cycle where they breathe in oxygen of some form, sub -faction.
00:10
For example, the dog, the bunny, the rat, brings in oxygen from the plant material around them, putting it out there as it goes through photosynthesis.
00:21
And then all vertebrates breathe out carbon dioxide, which plants will typically take up along with sun's energy.
00:31
To photosynthesize and produce their own energy.
00:35
And as a byproduct, these plants, trees and things will produce a bioproduce of oxygen, which again then those vertebrates will take in for their respiration.
00:50
Some organisms will have a countercurrent of water and air.
00:54
Water will flow one way and then the air will flow another.
00:57
And it's allowing for the oxygen, the air, oxygen to, be able to go across the respiratory organs.
01:09
In a number of fishes, the water to blood distance across which it must diffuse, there in the gill, along the gill filaments, is much the same as the distance as the air to blood pathway in mammals like ourselves, in our lungs...