Myeloid cells include highly phagocytic, motile neutrophils, monocytes, and macrophages that provide a primary line of defense against most pathogens.
What is the 1st line of defense of the immune system?
The first line of defence 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.
How does the body's first line of defense function ?
the body's first line of defense against pathogens are barriers that trap and kill most pathogens with which you inherit contact. The surfaces of the skin, breathing passages, mouth, and stomach function as these barriers.
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