OVERVIEW OF THE IMMUNE SYSTEM
MACROPHAGES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Select all examples of physical barriers
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skin, mucus, tears
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skin, mucus, earwax
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skin, tears, earwax
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stomach acid, music, earwax
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Explanation:
Detailed explanation-1: -Physical barriers include skin, mucus, digestive tract membranes, and traps of respiratory and urogenital which traps entering microorganisms.
Detailed explanation-2: -Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid.
Detailed explanation-3: -Mechanical barriers-which include the skin, mucous membranes, and fluids such as tears and urine-physically block pathogens from entering the body. Chemical barriers-such as enzymes in sweat, saliva, and semen-kill pathogens on body surfaces.
There is 1 question to complete.