human defence systems
- Created by: Muskaan Dhaliwal
- Created on: 05-08-19 15:57
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- human defence systems
- immune system
- white blood cells are part of the immune system
- pathogens are identified by white blood cells by the different proteins on their surfaces
- white blood cells are part of the immune system
- non specific defence systems
- the human body has several non specific ways of defending itself from pathogens getting in
- nose
- nasal hairs, sticky mucus and cilia
- prevent pathogens entering the body through the nostrils
- nasal hairs, sticky mucus and cilia
- trachea and bronchus (respiratory system)
- lined with mucus to tap dust and pathogens
- cilia move the mucus upwards to be swallowed
- stomach acid
- kills most ingested pathogens
- ph1 strong acid
- skin
- hard to penetrate waterproof barrier
- glands secrete oil which kills microbes
- immune system
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