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Many microbial pathogens enter the gut o...

Many microbial pathogens enter the gut of humans along with food. What are the preventive barriers to protect the body from such pathogens? What type of immunity do you observe in this case?

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(i) Mucus of goblet cells of gut acts as physical barrier and traps the microbes going inside along with food.
(ii) Saliva of salivary glands contains lysozyme which kills the germs.
(iii) HCI of oxyntic cells of gastric glands of stomach also kills the bacteria. (iv) Bileof liverprevents the growthofbacteria in intestine. These collectively form Innate immunity.
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