Author: Freesciencelessons via YouTube
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In this video, we look at gas exchange in mammals. First we look at the structure of the lungs, focussing on two adaptations of the trachea. We then explore the structure and function of the alveoli, looking at how the alveoli are adapted for the efficient diffusion of oxygen and carbon dioxide.

Image Credits:

Tuna
https://commons.wikimedia.org/wiki/File:Thunnus_orientalis.jpg
Stephane-bdc, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Salmon
https://commons.wikimedia.org/wiki/File:Salmo_salar-Atlantic_Salmon-Atlanterhavsparken_Norway_(cropped).JPG
Hans-Petter Fjeld, CC BY-SA 2.5 https://creativecommons.org/licenses/by-sa/2.5, via Wikimedia Commons

Cod
https://commons.wikimedia.org/wiki/File:Gadus_morhua-Cod-2-Atlanterhavsparken-Norway.JPG
Hans-Petter Fjeld, CC BY-SA 2.5 https://creativecommons.org/licenses/by-sa/2.5, via Wikimedia Commons

Trout
https://commons.wikimedia.org/wiki/File:Marble_trout_from_zadlaščica.jpg
Public domain

Tiger
https://commons.wikimedia.org/wiki/File:Panthera_tigris_altaica_in_Lodz_Zoo_1.jpg
Chrumps, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Orangutan
https://commons.wikimedia.org/wiki/File:Bornean_Orangutan_(Pongo_pygmaeus)_(14562544106).jpg
Bernard DUPONT from FRANCE, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons

Lemur
https://commons.wikimedia.org/wiki/File:Lemur_(39822796120).jpg
Mathias Appel, CC0, via Wikimedia Commons

Polar Bears
https://commons.wikimedia.org/wiki/File:Female_polar_bear_(Ursus_maritimus)_with_cub,_Svalbard.jpg
AWeith, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

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