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A Level Biology Revision "Gas Exchange in Mammals"

You can find all my A Level Biology videos fully indexed at https://www.freesciencelessons.co.uk/... 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. This video is aimed at the UK A Level Biology specifications. Students studying International A Level Biology will need to check their specification. Image Credits: Tuna https://commons.wikimedia.org/wiki/Fi... Stephane-bdc, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Salmon https://commons.wikimedia.org/wiki/Fi... Hans-Petter Fjeld, CC BY-SA 2.5 https://creativecommons.org/licenses/..., via Wikimedia Commons Cod https://commons.wikimedia.org/wiki/Fi... Hans-Petter Fjeld, CC BY-SA 2.5 https://creativecommons.org/licenses/..., via Wikimedia Commons Trout https://commons.wikimedia.org/wiki/Fi... Public domain Tiger https://commons.wikimedia.org/wiki/Fi... Chrumps, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Orangutan https://commons.wikimedia.org/wiki/Fi... Bernard DUPONT from FRANCE, CC BY-SA 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Lemur https://commons.wikimedia.org/wiki/Fi... Mathias Appel, CC0, via Wikimedia Commons Polar Bears https://commons.wikimedia.org/wiki/Fi... AWeith, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons