The first line of defense against a pathogen would be barriers. Ex. The skin, Breathing Passages, and The Mouth and stomach.
antibody production by plasma cells
When a pathogen enters the body, it first encounters the body's physical and chemical barriers, primarily the skin and mucous membranes. These barriers provide a first line of defense by preventing the pathogen from entering deeper tissues. If the pathogen breaches these surfaces, it then encounters immune cells and proteins in the innate immune system, which act quickly to identify and combat the invader.
Your skin and your mucus membranes are your body's first line of defense against any pathogen whether that be dust, or a virus!
It is a non-specific Immune response as it does not change based on interaction with a pathogen and will activate regardless whether the pathogen in question has been encountered previously. Commonly referred to as being part of the "Second Line of Defence".
skin and mucous membranes first line of defense second line-leukocytes and macrophages, inflammation and fever third is immune system
The first line of defense against disease is the body's innate immune system, which includes physical barriers like the skin and mucous membranes, as well as specialized cells that target and destroy pathogens. These defenses work to prevent pathogens from entering the body or to eliminate them quickly before they can cause harm.
Your skin is the first line of defense.
The first line of defense includes the skin, breathing passage, mouth and stomach.
In the immune system, the first line of defense are mechanical and physical barriers, such as the skin and the cornea of the eye. The main line of defense, meanwhile, are the innate immunity and acquired immunity of an organism.
The body's second line of defense comes into play when pathogens breach the first line of defense, which includes physical barriers like skin and mucous membranes. This response is part of the innate immune system and involves various mechanisms such as inflammation, the activation of phagocytes, and the release of antimicrobial substances. These actions help to contain and eliminate the invading pathogens. Additionally, the second line of defense is non-specific, meaning it responds the same way regardless of the type of pathogen encountered.
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