A Level Biology Revision quotNonspecific Defences Against Pathogensquot

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http://youtube.com/watch?v=tvGiGuRle8k

You can find all my A Level Biology videos fully indexed at https://www.freesciencelessons.co.uk/... • In this video, we start looking at the body's non-specific defences against pathogens. These include the skin, mucous membranes, lysozyme and expulsive reflexes. In the next video, we look at blood clotting and inflammation. • Image credits: • Human Skin Structure • https://commons.wikimedia.org/wiki/Fi... • XenonR, CC BY 3.0 https://creativecommons.org/licenses/... • Tear • https://commons.wikimedia.org/wiki/Fi... • NessaLand, CC BY 2.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • Scab • https://commons.wikimedia.org/wiki/Fi... • Jpbarrass, Public domain, via Wikimedia Commons • Sebaceous gland • https://commons.wikimedia.org/wiki/Fi... • OpenStax College, CC BY 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • Epidermis and dermis • https://commons.wikimedia.org/wiki/Fi... • Normal_Epidermis_and_Dermis_with_Intradermal_Nevus_10x.JPG: Kilbadderivative work: Fama Clamosa, Public domain, via Wikimedia Commons • Lining of treachea • https://commons.wikimedia.org/wiki/Fi... • Magscope, CC BY-SA 4.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • Gastric mucosa • https://commons.wikimedia.org/wiki/Fi... • Nephron, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons • Sneeze • https://commons.wikimedia.org/wiki/Fi... • James Gathany, Public domain, via Wikimedia Commons • Coughing • https://commons.wikimedia.org/wiki/Fi... • https://upload.wikimedia.org/wikipedi...

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