Uploaded August 2024 | Updated September 2026, 3 days ago

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In this video, we look at excretion and waste products. First we look at the definition of excretion. We then look at the waste products carbon dioxide, nitrogenous waste products including urea and bile pigments.

Image credits:

Tiger
commons.wikimedia.org/wiki/File:Siberischer_tiger_de.jpg
S. Taheri, CC BY-SA 2.5 creativecommons.org/licenses/by-sa/2.5, via Wikimedia Commons

Fish
commons.wikimedia.org/wiki/File:Vieja_melanura_-_Karlsruhe_Zoo_01.jpg
H. Zell, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons

Bird
commons.wikimedia.org/wiki/File:Female_house_sparrow_at_Kodai.jpg
Deepak Sundar, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Insect
commons.wikimedia.org/wiki/File:Sympetrum_sanguineum_qtl13.jpg
Quartl, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons

Red blood cells
commons.wikimedia.org/wiki/File:Blood-rbcs_and_thrombocytes2.jpg
Echinaceapallida, CC BY-SA 4.0 creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons

Liver animation
commons.wikimedia.org/wiki/File:Liver_01_animation2.gif
Polygon data is generated by Database Center for Life Science(DBCLS)[2], CC BY-SA 2.1 JP creativecommons.org/licenses/by-sa/2.1/jp/deed.en, via Wikimedia Commons