2 years ago

Which part of the immune system is a physical barrier?

2 answers:

7 0

Physical barriers of the immune system<span>The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.</span>

Andrei [34K]2 years ago

5 0

Answer:

The Skin

Explanation:

Just took the quiz, this is the correct answer. Next time though, write down the options so others can help.

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