🛡️ The immune system (OCR)

Immunity against invading pathogens is a crucial part of maintaining health. The body has adaptations which prevent invasion by pathogens, as well as processes in place to deal with those that manage to penetrate the body’s primary defenses. The skin and mucous membranes (e.g. mouth) are examples of such defenses. Sweat contains lysozyme which is an enzyme that breaks down bacterial walls. Stomach acid also destroys microorganisms that are ingested.

 

If pathogens do invade the body, the subsequent immune response is split between:

 

1. Non-specific
2. Specific

 

The non-specific immune response is inflammation and phagocytosis. The specific immune response involves the formation of memory following an infection, in order to better fight and prevent recurrent infections by the same agent that is highly specifically identified.

 

Neutrophils are the most abundant white blood cell that identifies foreign agents in the body and digests them by…